diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
index 22ad2d0ab..81e2ff548 100644
--- a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
@@ -32,6 +32,7 @@
 #include "suggest/core/suggest_options.h"
 #include "suggest/policyimpl/dictionary/structure/dictionary_structure_with_buffer_policy_factory.h"
 #include "utils/char_utils.h"
+#include "utils/int_array_view.h"
 #include "utils/jni_data_utils.h"
 #include "utils/log_utils.h"
 #include "utils/time_keeper.h"
@@ -581,8 +582,9 @@ static bool latinime_BinaryDictionary_migrateNative(JNIEnv *env, jclass clazz, j
                 return false;
             }
         }
-        if (!dictionaryStructureWithBufferPolicy->addUnigramEntry(wordCodePoints,
-                wordCodePointCount, wordProperty.getUnigramProperty())) {
+        if (!dictionaryStructureWithBufferPolicy->addUnigramEntry(
+                CodePointArrayView(wordCodePoints, wordCodePointCount),
+                wordProperty.getUnigramProperty())) {
             LogUtils::logToJava(env, "Cannot add unigram to the new dict.");
             return false;
         }
diff --git a/native/jni/src/suggest/core/dictionary/dictionary.cpp b/native/jni/src/suggest/core/dictionary/dictionary.cpp
index d62573970..c025bfcf5 100644
--- a/native/jni/src/suggest/core/dictionary/dictionary.cpp
+++ b/native/jni/src/suggest/core/dictionary/dictionary.cpp
@@ -28,6 +28,7 @@
 #include "suggest/core/suggest_options.h"
 #include "suggest/policyimpl/gesture/gesture_suggest_policy_factory.h"
 #include "suggest/policyimpl/typing/typing_suggest_policy_factory.h"
+#include "utils/int_array_view.h"
 #include "utils/log_utils.h"
 #include "utils/time_keeper.h"
 
@@ -112,8 +113,8 @@ int Dictionary::getMaxProbabilityOfExactMatches(const int *word, int length) con
 int Dictionary::getNgramProbability(const PrevWordsInfo *const prevWordsInfo, const int *word,
         int length) const {
     TimeKeeper::setCurrentTime();
-    int nextWordPos = mDictionaryStructureWithBufferPolicy->getTerminalPtNodePositionOfWord(word,
-            length, false /* forceLowerCaseSearch */);
+    int nextWordPos = mDictionaryStructureWithBufferPolicy->getTerminalPtNodePositionOfWord(
+            CodePointArrayView(word, length), false /* forceLowerCaseSearch */);
     if (NOT_A_DICT_POS == nextWordPos) return NOT_A_PROBABILITY;
     if (!prevWordsInfo) {
         return getDictionaryStructurePolicy()->getProbabilityOfPtNode(
@@ -135,12 +136,14 @@ bool Dictionary::addUnigramEntry(const int *const word, const int length,
         return false;
     }
     TimeKeeper::setCurrentTime();
-    return mDictionaryStructureWithBufferPolicy->addUnigramEntry(word, length, unigramProperty);
+    return mDictionaryStructureWithBufferPolicy->addUnigramEntry(CodePointArrayView(word, length),
+            unigramProperty);
 }
 
 bool Dictionary::removeUnigramEntry(const int *const codePoints, const int codePointCount) {
     TimeKeeper::setCurrentTime();
-    return mDictionaryStructureWithBufferPolicy->removeUnigramEntry(codePoints, codePointCount);
+    return mDictionaryStructureWithBufferPolicy->removeUnigramEntry(
+            CodePointArrayView(codePoints, codePointCount));
 }
 
 bool Dictionary::addNgramEntry(const PrevWordsInfo *const prevWordsInfo,
@@ -152,7 +155,8 @@ bool Dictionary::addNgramEntry(const PrevWordsInfo *const prevWordsInfo,
 bool Dictionary::removeNgramEntry(const PrevWordsInfo *const prevWordsInfo,
         const int *const word, const int length) {
     TimeKeeper::setCurrentTime();
-    return mDictionaryStructureWithBufferPolicy->removeNgramEntry(prevWordsInfo, word, length);
+    return mDictionaryStructureWithBufferPolicy->removeNgramEntry(prevWordsInfo,
+            CodePointArrayView(word, length));
 }
 
 bool Dictionary::flush(const char *const filePath) {
@@ -181,7 +185,7 @@ const WordProperty Dictionary::getWordProperty(const int *const codePoints,
         const int codePointCount) {
     TimeKeeper::setCurrentTime();
     return mDictionaryStructureWithBufferPolicy->getWordProperty(
-            codePoints, codePointCount);
+            CodePointArrayView(codePoints, codePointCount));
 }
 
 int Dictionary::getNextWordAndNextToken(const int token, int *const outCodePoints,
diff --git a/native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h b/native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h
index 5052f46cb..0faf00003 100644
--- a/native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h
+++ b/native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h
@@ -21,6 +21,7 @@
 
 #include "defines.h"
 #include "suggest/core/dictionary/property/word_property.h"
+#include "utils/int_array_view.h"
 
 namespace latinime {
 
@@ -49,33 +50,32 @@ class DictionaryStructureWithBufferPolicy {
             DicNodeVector *const childDicNodes) const = 0;
 
     virtual int getCodePointsAndProbabilityAndReturnCodePointCount(
-            const int nodePos, const int maxCodePointCount, int *const outCodePoints,
+            const int ptNodePos, const int maxCodePointCount, int *const outCodePoints,
             int *const outUnigramProbability) const = 0;
 
-    virtual int getTerminalPtNodePositionOfWord(const int *const inWord,
-            const int length, const bool forceLowerCaseSearch) const = 0;
+    virtual int getTerminalPtNodePositionOfWord(const CodePointArrayView wordCodePoints,
+            const bool forceLowerCaseSearch) const = 0;
 
-    virtual int getProbability(const int unigramProbability,
-            const int bigramProbability) const = 0;
+    virtual int getProbability(const int unigramProbability, const int bigramProbability) const = 0;
 
     virtual int getProbabilityOfPtNode(const int *const prevWordsPtNodePos,
-            const int nodePos) const = 0;
+            const int ptNodePos) const = 0;
 
     virtual void iterateNgramEntries(const int *const prevWordsPtNodePos,
             NgramListener *const listener) const = 0;
 
-    virtual int getShortcutPositionOfPtNode(const int nodePos) const = 0;
+    virtual int getShortcutPositionOfPtNode(const int ptNodePos) const = 0;
 
     virtual const DictionaryHeaderStructurePolicy *getHeaderStructurePolicy() const = 0;
 
     virtual const DictionaryShortcutsStructurePolicy *getShortcutsStructurePolicy() const = 0;
 
     // Returns whether the update was success or not.
-    virtual bool addUnigramEntry(const int *const word, const int length,
+    virtual bool addUnigramEntry(const CodePointArrayView wordCodePoints,
             const UnigramProperty *const unigramProperty) = 0;
 
     // Returns whether the update was success or not.
-    virtual bool removeUnigramEntry(const int *const word, const int length) = 0;
+    virtual bool removeUnigramEntry(const CodePointArrayView wordCodePoints) = 0;
 
     // Returns whether the update was success or not.
     virtual bool addNgramEntry(const PrevWordsInfo *const prevWordsInfo,
@@ -83,7 +83,7 @@ class DictionaryStructureWithBufferPolicy {
 
     // Returns whether the update was success or not.
     virtual bool removeNgramEntry(const PrevWordsInfo *const prevWordsInfo,
-            const int *const word, const int length) = 0;
+            const CodePointArrayView wordCodePoints) = 0;
 
     // Returns whether the flush was success or not.
     virtual bool flush(const char *const filePath) = 0;
@@ -99,8 +99,7 @@ class DictionaryStructureWithBufferPolicy {
             const int maxResultLength) = 0;
 
     // Used for testing.
-    virtual const WordProperty getWordProperty(const int *const codePonts,
-            const int codePointCount) const = 0;
+    virtual const WordProperty getWordProperty(const CodePointArrayView wordCodePoints) const = 0;
 
     // Method to iterate all words in the dictionary.
     // The returned token has to be used to get the next word. If token is 0, this method newly
diff --git a/native/jni/src/suggest/core/session/prev_words_info.h b/native/jni/src/suggest/core/session/prev_words_info.h
index e44e876e9..9b3a7d468 100644
--- a/native/jni/src/suggest/core/session/prev_words_info.h
+++ b/native/jni/src/suggest/core/session/prev_words_info.h
@@ -21,6 +21,7 @@
 #include "suggest/core/dictionary/binary_dictionary_bigrams_iterator.h"
 #include "suggest/core/policy/dictionary_structure_with_buffer_policy.h"
 #include "utils/char_utils.h"
+#include "utils/int_array_view.h"
 
 namespace latinime {
 
@@ -91,19 +92,11 @@ class PrevWordsInfo {
     }
 
     // n is 1-indexed.
-    const int *getNthPrevWordCodePoints(const int n) const {
+    const CodePointArrayView getNthPrevWordCodePoints(const int n) const {
         if (n <= 0 || n > MAX_PREV_WORD_COUNT_FOR_N_GRAM) {
-            return nullptr;
+            return CodePointArrayView();
         }
-        return mPrevWordCodePoints[n - 1];
-    }
-
-    // n is 1-indexed.
-    int getNthPrevWordCodePointCount(const int n) const {
-        if (n <= 0 || n > MAX_PREV_WORD_COUNT_FOR_N_GRAM) {
-            return 0;
-        }
-        return mPrevWordCodePointCount[n - 1];
+        return CodePointArrayView(mPrevWordCodePoints[n - 1], mPrevWordCodePointCount[n - 1]);
     }
 
     // n is 1-indexed.
@@ -134,8 +127,9 @@ class PrevWordsInfo {
                 return NOT_A_DICT_POS;
             }
         }
+        const CodePointArrayView codePointArrayView(codePoints, codePointCount);
         const int wordPtNodePos = dictStructurePolicy->getTerminalPtNodePositionOfWord(
-                codePoints, codePointCount, false /* forceLowerCaseSearch */);
+                codePointArrayView, false /* forceLowerCaseSearch */);
         if (wordPtNodePos != NOT_A_DICT_POS || !tryLowerCaseSearch) {
             // Return the position when when the word was found or doesn't try lower case
             // search.
@@ -144,7 +138,7 @@ class PrevWordsInfo {
         // Check bigrams for lower-cased previous word if original was not found. Useful for
         // auto-capitalized words like "The [current_word]".
         return dictStructurePolicy->getTerminalPtNodePositionOfWord(
-                codePoints, codePointCount, true /* forceLowerCaseSearch */);
+                codePointArrayView, true /* forceLowerCaseSearch */);
     }
 
     void clear() {
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.cpp b/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.cpp
index c86ae9305..9f6ae114d 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.cpp
@@ -104,12 +104,12 @@ int Ver4PatriciaTriePolicy::getCodePointsAndProbabilityAndReturnCodePointCount(
     return codePointCount;
 }
 
-int Ver4PatriciaTriePolicy::getTerminalPtNodePositionOfWord(const int *const inWord,
-        const int length, const bool forceLowerCaseSearch) const {
+int Ver4PatriciaTriePolicy::getTerminalPtNodePositionOfWord(const CodePointArrayView wordCodePoints,
+        const bool forceLowerCaseSearch) const {
     DynamicPtReadingHelper readingHelper(&mNodeReader, &mPtNodeArrayReader);
     readingHelper.initWithPtNodeArrayPos(getRootPosition());
-    const int ptNodePos =
-            readingHelper.getTerminalPtNodePositionOfWord(inWord, length, forceLowerCaseSearch);
+    const int ptNodePos = readingHelper.getTerminalPtNodePositionOfWord(wordCodePoints.data(),
+            wordCodePoints.size(), forceLowerCaseSearch);
     if (readingHelper.isError()) {
         mIsCorrupted = true;
         AKLOGE("Dictionary reading error in createAndGetAllChildDicNodes().");
@@ -194,7 +194,7 @@ int Ver4PatriciaTriePolicy::getBigramsPositionOfPtNode(const int ptNodePos) cons
             ptNodeParams.getTerminalId());
 }
 
-bool Ver4PatriciaTriePolicy::addUnigramEntry(const int *const word, const int length,
+bool Ver4PatriciaTriePolicy::addUnigramEntry(const CodePointArrayView wordCodePoints,
         const UnigramProperty *const unigramProperty) {
     if (!mBuffers->isUpdatable()) {
         AKLOGI("Warning: addUnigramEntry() is called for non-updatable dictionary.");
@@ -205,8 +205,9 @@ bool Ver4PatriciaTriePolicy::addUnigramEntry(const int *const word, const int le
                 mDictBuffer->getTailPosition());
         return false;
     }
-    if (length > MAX_WORD_LENGTH) {
-        AKLOGE("The word is too long to insert to the dictionary, length: %d", length);
+    if (wordCodePoints.size() > MAX_WORD_LENGTH) {
+        AKLOGE("The word is too long to insert to the dictionary, length: %zd",
+                wordCodePoints.size());
         return false;
     }
     for (const auto &shortcut : unigramProperty->getShortcuts()) {
@@ -220,8 +221,8 @@ bool Ver4PatriciaTriePolicy::addUnigramEntry(const int *const word, const int le
     readingHelper.initWithPtNodeArrayPos(getRootPosition());
     bool addedNewUnigram = false;
     int codePointsToAdd[MAX_WORD_LENGTH];
-    int codePointCountToAdd = length;
-    memmove(codePointsToAdd, word, sizeof(int) * length);
+    int codePointCountToAdd = wordCodePoints.size();
+    memmove(codePointsToAdd, wordCodePoints.data(), sizeof(int) * codePointCountToAdd);
     if (unigramProperty->representsBeginningOfSentence()) {
         codePointCountToAdd = CharUtils::attachBeginningOfSentenceMarker(codePointsToAdd,
                 codePointCountToAdd, MAX_WORD_LENGTH);
@@ -229,14 +230,15 @@ bool Ver4PatriciaTriePolicy::addUnigramEntry(const int *const word, const int le
     if (codePointCountToAdd <= 0) {
         return false;
     }
-    if (mUpdatingHelper.addUnigramWord(&readingHelper, codePointsToAdd, codePointCountToAdd,
-            unigramProperty, &addedNewUnigram)) {
+    const CodePointArrayView codePointArrayView(codePointsToAdd, codePointCountToAdd);
+    if (mUpdatingHelper.addUnigramWord(&readingHelper, codePointArrayView.data(),
+            codePointArrayView.size(), unigramProperty, &addedNewUnigram)) {
         if (addedNewUnigram && !unigramProperty->representsBeginningOfSentence()) {
             mUnigramCount++;
         }
         if (unigramProperty->getShortcuts().size() > 0) {
             // Add shortcut target.
-            const int wordPos = getTerminalPtNodePositionOfWord(word, length,
+            const int wordPos = getTerminalPtNodePositionOfWord(codePointArrayView,
                     false /* forceLowerCaseSearch */);
             if (wordPos == NOT_A_DICT_POS) {
                 AKLOGE("Cannot find terminal PtNode position to add shortcut target.");
@@ -259,12 +261,12 @@ bool Ver4PatriciaTriePolicy::addUnigramEntry(const int *const word, const int le
     }
 }
 
-bool Ver4PatriciaTriePolicy::removeUnigramEntry(const int *const word, const int length) {
+bool Ver4PatriciaTriePolicy::removeUnigramEntry(const CodePointArrayView wordCodePoints) {
     if (!mBuffers->isUpdatable()) {
         AKLOGI("Warning: removeUnigramEntry() is called for non-updatable dictionary.");
         return false;
     }
-    const int ptNodePos = getTerminalPtNodePositionOfWord(word, length,
+    const int ptNodePos = getTerminalPtNodePositionOfWord(wordCodePoints,
             false /* forceLowerCaseSearch */);
     if (ptNodePos == NOT_A_DICT_POS) {
         return false;
@@ -305,7 +307,6 @@ bool Ver4PatriciaTriePolicy::addNgramEntry(const PrevWordsInfo *const prevWordsI
                     false /* isBlacklisted */, MAX_PROBABILITY /* probability */,
                     NOT_A_TIMESTAMP /* timestamp */, 0 /* level */, 0 /* count */, &shortcuts);
             if (!addUnigramEntry(prevWordsInfo->getNthPrevWordCodePoints(1 /* n */),
-                    prevWordsInfo->getNthPrevWordCodePointCount(1 /* n */),
                     &beginningOfSentenceUnigramProperty)) {
                 AKLOGE("Cannot add unigram entry for the beginning-of-sentence.");
                 return false;
@@ -318,8 +319,8 @@ bool Ver4PatriciaTriePolicy::addNgramEntry(const PrevWordsInfo *const prevWordsI
         }
     }
     const int word1Pos = getTerminalPtNodePositionOfWord(
-            bigramProperty->getTargetCodePoints()->data(),
-            bigramProperty->getTargetCodePoints()->size(), false /* forceLowerCaseSearch */);
+            CodePointArrayView(*bigramProperty->getTargetCodePoints()),
+            false /* forceLowerCaseSearch */);
     if (word1Pos == NOT_A_DICT_POS) {
         return false;
     }
@@ -336,7 +337,7 @@ bool Ver4PatriciaTriePolicy::addNgramEntry(const PrevWordsInfo *const prevWordsI
 }
 
 bool Ver4PatriciaTriePolicy::removeNgramEntry(const PrevWordsInfo *const prevWordsInfo,
-        const int *const word, const int length) {
+        const CodePointArrayView wordCodePoints) {
     if (!mBuffers->isUpdatable()) {
         AKLOGI("Warning: removeNgramEntry() is called for non-updatable dictionary.");
         return false;
@@ -350,8 +351,9 @@ bool Ver4PatriciaTriePolicy::removeNgramEntry(const PrevWordsInfo *const prevWor
         AKLOGE("prev words info is not valid for removing n-gram entry form the dictionary.");
         return false;
     }
-    if (length > MAX_WORD_LENGTH) {
-        AKLOGE("word is too long to remove n-gram entry form the dictionary. length: %d", length);
+    if (wordCodePoints.size() > MAX_WORD_LENGTH) {
+        AKLOGE("word is too long to remove n-gram entry form the dictionary. length: %zd",
+                wordCodePoints.size());
     }
     int prevWordsPtNodePos[MAX_PREV_WORD_COUNT_FOR_N_GRAM];
     prevWordsInfo->getPrevWordsTerminalPtNodePos(this, prevWordsPtNodePos,
@@ -360,7 +362,7 @@ bool Ver4PatriciaTriePolicy::removeNgramEntry(const PrevWordsInfo *const prevWor
     if (prevWordsPtNodePos[0] == NOT_A_DICT_POS) {
         return false;
     }
-    const int wordPos = getTerminalPtNodePositionOfWord(word, length,
+    const int wordPos = getTerminalPtNodePositionOfWord(wordCodePoints,
             false /* forceLowerCaseSearch */);
     if (wordPos == NOT_A_DICT_POS) {
         return false;
@@ -445,9 +447,9 @@ void Ver4PatriciaTriePolicy::getProperty(const char *const query, const int quer
     }
 }
 
-const WordProperty Ver4PatriciaTriePolicy::getWordProperty(const int *const codePoints,
-        const int codePointCount) const {
-    const int ptNodePos = getTerminalPtNodePositionOfWord(codePoints, codePointCount,
+const WordProperty Ver4PatriciaTriePolicy::getWordProperty(
+        const CodePointArrayView wordCodePoints) const {
+    const int ptNodePos = getTerminalPtNodePositionOfWord(wordCodePoints,
             false /* forceLowerCaseSearch */);
     if (ptNodePos == NOT_A_DICT_POS) {
         AKLOGE("getWordProperty is called for invalid word.");
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.h b/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.h
index fac3828c3..df119e3a1 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.h
@@ -39,6 +39,7 @@
 #include "suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_writing_helper.h"
 #include "suggest/policyimpl/dictionary/structure/backward/v402/ver4_pt_node_array_reader.h"
 #include "suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer.h"
+#include "utils/int_array_view.h"
 
 namespace latinime {
 namespace backward {
@@ -75,7 +76,7 @@ class Ver4PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
               mBigramCount(mHeaderPolicy->getBigramCount()),
               mTerminalPtNodePositionsForIteratingWords(), mIsCorrupted(false) {};
 
-    AK_FORCE_INLINE int getRootPosition() const {
+    virtual int getRootPosition() const {
         return 0;
     }
 
@@ -86,8 +87,8 @@ class Ver4PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
             const int terminalPtNodePos, const int maxCodePointCount, int *const outCodePoints,
             int *const outUnigramProbability) const;
 
-    int getTerminalPtNodePositionOfWord(const int *const inWord,
-            const int length, const bool forceLowerCaseSearch) const;
+    int getTerminalPtNodePositionOfWord(const CodePointArrayView wordCodePoints,
+            const bool forceLowerCaseSearch) const;
 
     int getProbability(const int unigramProbability, const int bigramProbability) const;
 
@@ -106,16 +107,16 @@ class Ver4PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
         return &mShortcutPolicy;
     }
 
-    bool addUnigramEntry(const int *const word, const int length,
+    bool addUnigramEntry(const CodePointArrayView wordCodePoints,
             const UnigramProperty *const unigramProperty);
 
-    bool removeUnigramEntry(const int *const word, const int length);
+    bool removeUnigramEntry(const CodePointArrayView wordCodePoints);
 
     bool addNgramEntry(const PrevWordsInfo *const prevWordsInfo,
             const BigramProperty *const bigramProperty);
 
-    bool removeNgramEntry(const PrevWordsInfo *const prevWordsInfo, const int *const word1,
-            const int length1);
+    bool removeNgramEntry(const PrevWordsInfo *const prevWordsInfo,
+            const CodePointArrayView wordCodePoints);
 
     bool flush(const char *const filePath);
 
@@ -126,8 +127,7 @@ class Ver4PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
     void getProperty(const char *const query, const int queryLength, char *const outResult,
             const int maxResultLength);
 
-    const WordProperty getWordProperty(const int *const codePoints,
-            const int codePointCount) const;
+    const WordProperty getWordProperty(const CodePointArrayView wordCodePoints) const;
 
     int getNextWordAndNextToken(const int token, int *const outCodePoints,
             int *const outCodePointCount);
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.cpp b/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.cpp
index aca64b351..4ac366e07 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.cpp
@@ -268,12 +268,12 @@ int PatriciaTriePolicy::getCodePointsAndProbabilityAndReturnCodePointCount(
 
 // This function gets the position of the terminal PtNode of the exact matching word in the
 // dictionary. If no match is found, it returns NOT_A_DICT_POS.
-int PatriciaTriePolicy::getTerminalPtNodePositionOfWord(const int *const inWord,
-        const int length, const bool forceLowerCaseSearch) const {
+int PatriciaTriePolicy::getTerminalPtNodePositionOfWord(const CodePointArrayView wordCodePoints,
+        const bool forceLowerCaseSearch) const {
     DynamicPtReadingHelper readingHelper(&mPtNodeReader, &mPtNodeArrayReader);
     readingHelper.initWithPtNodeArrayPos(getRootPosition());
-    const int ptNodePos =
-            readingHelper.getTerminalPtNodePositionOfWord(inWord, length, forceLowerCaseSearch);
+    const int ptNodePos = readingHelper.getTerminalPtNodePositionOfWord(wordCodePoints.data(),
+            wordCodePoints.size(), forceLowerCaseSearch);
     if (readingHelper.isError()) {
         mIsCorrupted = true;
         AKLOGE("Dictionary reading error in createAndGetAllChildDicNodes().");
@@ -377,9 +377,9 @@ int PatriciaTriePolicy::createAndGetLeavingChildNode(const DicNode *const dicNod
     return siblingPos;
 }
 
-const WordProperty PatriciaTriePolicy::getWordProperty(const int *const codePoints,
-        const int codePointCount) const {
-    const int ptNodePos = getTerminalPtNodePositionOfWord(codePoints, codePointCount,
+const WordProperty PatriciaTriePolicy::getWordProperty(
+        const CodePointArrayView wordCodePoints) const {
+    const int ptNodePos = getTerminalPtNodePositionOfWord(wordCodePoints,
             false /* forceLowerCaseSearch */);
     if (ptNodePos == NOT_A_DICT_POS) {
         AKLOGE("getWordProperty was called for invalid word.");
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.h
index 4257b0bf6..4d9af2877 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.h
@@ -30,6 +30,7 @@
 #include "suggest/policyimpl/dictionary/utils/format_utils.h"
 #include "suggest/policyimpl/dictionary/utils/mmapped_buffer.h"
 #include "utils/byte_array_view.h"
+#include "utils/int_array_view.h"
 
 namespace latinime {
 
@@ -63,8 +64,8 @@ class PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
             const int terminalNodePos, const int maxCodePointCount, int *const outCodePoints,
             int *const outUnigramProbability) const;
 
-    int getTerminalPtNodePositionOfWord(const int *const inWord,
-            const int length, const bool forceLowerCaseSearch) const;
+    int getTerminalPtNodePositionOfWord(const CodePointArrayView wordCodePoints,
+            const bool forceLowerCaseSearch) const;
 
     int getProbability(const int unigramProbability, const int bigramProbability) const;
 
@@ -83,14 +84,14 @@ class PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
         return &mShortcutListPolicy;
     }
 
-    bool addUnigramEntry(const int *const word, const int length,
+    bool addUnigramEntry(const CodePointArrayView wordCodePoints,
             const UnigramProperty *const unigramProperty) {
         // This method should not be called for non-updatable dictionary.
         AKLOGI("Warning: addUnigramEntry() is called for non-updatable dictionary.");
         return false;
     }
 
-    bool removeUnigramEntry(const int *const word, const int length) {
+    bool removeUnigramEntry(const CodePointArrayView wordCodePoints) {
         // This method should not be called for non-updatable dictionary.
         AKLOGI("Warning: removeUnigramEntry() is called for non-updatable dictionary.");
         return false;
@@ -103,8 +104,8 @@ class PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
         return false;
     }
 
-    bool removeNgramEntry(const PrevWordsInfo *const prevWordsInfo, const int *const word,
-            const int length) {
+    bool removeNgramEntry(const PrevWordsInfo *const prevWordsInfo,
+            const CodePointArrayView wordCodePoints) {
         // This method should not be called for non-updatable dictionary.
         AKLOGI("Warning: removeNgramEntry() is called for non-updatable dictionary.");
         return false;
@@ -136,8 +137,7 @@ class PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
         }
     }
 
-    const WordProperty getWordProperty(const int *const codePoints,
-            const int codePointCount) const;
+    const WordProperty getWordProperty(const CodePointArrayView wordCodePoints) const;
 
     int getNextWordAndNextToken(const int token, int *const outCodePoints,
             int *const outCodePointCount);
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.cpp b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.cpp
index ae3208cfe..619cdb59b 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.cpp
@@ -94,12 +94,12 @@ int Ver4PatriciaTriePolicy::getCodePointsAndProbabilityAndReturnCodePointCount(
     return codePointCount;
 }
 
-int Ver4PatriciaTriePolicy::getTerminalPtNodePositionOfWord(const int *const inWord,
-        const int length, const bool forceLowerCaseSearch) const {
+int Ver4PatriciaTriePolicy::getTerminalPtNodePositionOfWord(const CodePointArrayView wordCodePoints,
+        const bool forceLowerCaseSearch) const {
     DynamicPtReadingHelper readingHelper(&mNodeReader, &mPtNodeArrayReader);
     readingHelper.initWithPtNodeArrayPos(getRootPosition());
-    const int ptNodePos =
-            readingHelper.getTerminalPtNodePositionOfWord(inWord, length, forceLowerCaseSearch);
+    const int ptNodePos = readingHelper.getTerminalPtNodePositionOfWord(wordCodePoints.data(),
+            wordCodePoints.size(), forceLowerCaseSearch);
     if (readingHelper.isError()) {
         mIsCorrupted = true;
         AKLOGE("Dictionary reading error in createAndGetAllChildDicNodes().");
@@ -189,7 +189,7 @@ int Ver4PatriciaTriePolicy::getShortcutPositionOfPtNode(const int ptNodePos) con
             ptNodeParams.getTerminalId());
 }
 
-bool Ver4PatriciaTriePolicy::addUnigramEntry(const int *const word, const int length,
+bool Ver4PatriciaTriePolicy::addUnigramEntry(const CodePointArrayView wordCodePoints,
         const UnigramProperty *const unigramProperty) {
     if (!mBuffers->isUpdatable()) {
         AKLOGI("Warning: addUnigramEntry() is called for non-updatable dictionary.");
@@ -200,8 +200,9 @@ bool Ver4PatriciaTriePolicy::addUnigramEntry(const int *const word, const int le
                 mDictBuffer->getTailPosition());
         return false;
     }
-    if (length > MAX_WORD_LENGTH) {
-        AKLOGE("The word is too long to insert to the dictionary, length: %d", length);
+    if (wordCodePoints.size() > MAX_WORD_LENGTH) {
+        AKLOGE("The word is too long to insert to the dictionary, length: %zd",
+                wordCodePoints.size());
         return false;
     }
     for (const auto &shortcut : unigramProperty->getShortcuts()) {
@@ -215,8 +216,8 @@ bool Ver4PatriciaTriePolicy::addUnigramEntry(const int *const word, const int le
     readingHelper.initWithPtNodeArrayPos(getRootPosition());
     bool addedNewUnigram = false;
     int codePointsToAdd[MAX_WORD_LENGTH];
-    int codePointCountToAdd = length;
-    memmove(codePointsToAdd, word, sizeof(int) * length);
+    int codePointCountToAdd = wordCodePoints.size();
+    memmove(codePointsToAdd, wordCodePoints.data(), sizeof(int) * codePointCountToAdd);
     if (unigramProperty->representsBeginningOfSentence()) {
         codePointCountToAdd = CharUtils::attachBeginningOfSentenceMarker(codePointsToAdd,
                 codePointCountToAdd, MAX_WORD_LENGTH);
@@ -224,14 +225,15 @@ bool Ver4PatriciaTriePolicy::addUnigramEntry(const int *const word, const int le
     if (codePointCountToAdd <= 0) {
         return false;
     }
-    if (mUpdatingHelper.addUnigramWord(&readingHelper, codePointsToAdd, codePointCountToAdd,
-            unigramProperty, &addedNewUnigram)) {
+    const CodePointArrayView codePointArrayView(codePointsToAdd, codePointCountToAdd);
+    if (mUpdatingHelper.addUnigramWord(&readingHelper, codePointArrayView.data(),
+            codePointArrayView.size(), unigramProperty, &addedNewUnigram)) {
         if (addedNewUnigram && !unigramProperty->representsBeginningOfSentence()) {
             mUnigramCount++;
         }
         if (unigramProperty->getShortcuts().size() > 0) {
             // Add shortcut target.
-            const int wordPos = getTerminalPtNodePositionOfWord(word, length,
+            const int wordPos = getTerminalPtNodePositionOfWord(codePointArrayView,
                     false /* forceLowerCaseSearch */);
             if (wordPos == NOT_A_DICT_POS) {
                 AKLOGE("Cannot find terminal PtNode position to add shortcut target.");
@@ -254,12 +256,12 @@ bool Ver4PatriciaTriePolicy::addUnigramEntry(const int *const word, const int le
     }
 }
 
-bool Ver4PatriciaTriePolicy::removeUnigramEntry(const int *const word, const int length) {
+bool Ver4PatriciaTriePolicy::removeUnigramEntry(const CodePointArrayView wordCodePoints) {
     if (!mBuffers->isUpdatable()) {
         AKLOGI("Warning: removeUnigramEntry() is called for non-updatable dictionary.");
         return false;
     }
-    const int ptNodePos = getTerminalPtNodePositionOfWord(word, length,
+    const int ptNodePos = getTerminalPtNodePositionOfWord(wordCodePoints,
             false /* forceLowerCaseSearch */);
     if (ptNodePos == NOT_A_DICT_POS) {
         return false;
@@ -313,7 +315,6 @@ bool Ver4PatriciaTriePolicy::addNgramEntry(const PrevWordsInfo *const prevWordsI
                     false /* isBlacklisted */, MAX_PROBABILITY /* probability */,
                     NOT_A_TIMESTAMP /* timestamp */, 0 /* level */, 0 /* count */, &shortcuts);
             if (!addUnigramEntry(prevWordsInfo->getNthPrevWordCodePoints(1 /* n */),
-                    prevWordsInfo->getNthPrevWordCodePointCount(1 /* n */),
                     &beginningOfSentenceUnigramProperty)) {
                 AKLOGE("Cannot add unigram entry for the beginning-of-sentence.");
                 return false;
@@ -326,8 +327,8 @@ bool Ver4PatriciaTriePolicy::addNgramEntry(const PrevWordsInfo *const prevWordsI
         }
     }
     const int word1Pos = getTerminalPtNodePositionOfWord(
-            bigramProperty->getTargetCodePoints()->data(),
-            bigramProperty->getTargetCodePoints()->size(), false /* forceLowerCaseSearch */);
+            CodePointArrayView(*bigramProperty->getTargetCodePoints()),
+            false /* forceLowerCaseSearch */);
     if (word1Pos == NOT_A_DICT_POS) {
         return false;
     }
@@ -344,7 +345,7 @@ bool Ver4PatriciaTriePolicy::addNgramEntry(const PrevWordsInfo *const prevWordsI
 }
 
 bool Ver4PatriciaTriePolicy::removeNgramEntry(const PrevWordsInfo *const prevWordsInfo,
-        const int *const word, const int length) {
+        const CodePointArrayView wordCodePoints) {
     if (!mBuffers->isUpdatable()) {
         AKLOGI("Warning: removeNgramEntry() is called for non-updatable dictionary.");
         return false;
@@ -358,8 +359,9 @@ bool Ver4PatriciaTriePolicy::removeNgramEntry(const PrevWordsInfo *const prevWor
         AKLOGE("prev words info is not valid for removing n-gram entry form the dictionary.");
         return false;
     }
-    if (length > MAX_WORD_LENGTH) {
-        AKLOGE("word is too long to remove n-gram entry form the dictionary. length: %d", length);
+    if (wordCodePoints.size() > MAX_WORD_LENGTH) {
+        AKLOGE("word is too long to remove n-gram entry form the dictionary. length: %zd",
+                wordCodePoints.size());
     }
     int prevWordsPtNodePos[MAX_PREV_WORD_COUNT_FOR_N_GRAM];
     prevWordsInfo->getPrevWordsTerminalPtNodePos(this, prevWordsPtNodePos,
@@ -369,7 +371,7 @@ bool Ver4PatriciaTriePolicy::removeNgramEntry(const PrevWordsInfo *const prevWor
     if (prevWordsPtNodePos[0] == NOT_A_DICT_POS) {
         return false;
     }
-    const int wordPos = getTerminalPtNodePositionOfWord(word, length,
+    const int wordPos = getTerminalPtNodePositionOfWord(wordCodePoints,
             false /* forceLowerCaseSearch */);
     if (wordPos == NOT_A_DICT_POS) {
         return false;
@@ -453,9 +455,9 @@ void Ver4PatriciaTriePolicy::getProperty(const char *const query, const int quer
     }
 }
 
-const WordProperty Ver4PatriciaTriePolicy::getWordProperty(const int *const codePoints,
-        const int codePointCount) const {
-    const int ptNodePos = getTerminalPtNodePositionOfWord(codePoints, codePointCount,
+const WordProperty Ver4PatriciaTriePolicy::getWordProperty(
+        const CodePointArrayView wordCodePoints) const {
+    const int ptNodePos = getTerminalPtNodePositionOfWord(wordCodePoints,
             false /* forceLowerCaseSearch */);
     if (ptNodePos == NOT_A_DICT_POS) {
         AKLOGE("getWordProperty is called for invalid word.");
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.h
index 90e06c7f9..24f92a4aa 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.h
@@ -30,6 +30,7 @@
 #include "suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_writing_helper.h"
 #include "suggest/policyimpl/dictionary/structure/v4/ver4_pt_node_array_reader.h"
 #include "suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer.h"
+#include "utils/int_array_view.h"
 
 namespace latinime {
 
@@ -65,8 +66,8 @@ class Ver4PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
             const int terminalPtNodePos, const int maxCodePointCount, int *const outCodePoints,
             int *const outUnigramProbability) const;
 
-    int getTerminalPtNodePositionOfWord(const int *const inWord,
-            const int length, const bool forceLowerCaseSearch) const;
+    int getTerminalPtNodePositionOfWord(const CodePointArrayView wordCodePoints,
+            const bool forceLowerCaseSearch) const;
 
     int getProbability(const int unigramProbability, const int bigramProbability) const;
 
@@ -85,16 +86,16 @@ class Ver4PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
         return &mShortcutPolicy;
     }
 
-    bool addUnigramEntry(const int *const word, const int length,
+    bool addUnigramEntry(const CodePointArrayView wordCodePoints,
             const UnigramProperty *const unigramProperty);
 
-    bool removeUnigramEntry(const int *const word, const int length);
+    bool removeUnigramEntry(const CodePointArrayView wordCodePoints);
 
     bool addNgramEntry(const PrevWordsInfo *const prevWordsInfo,
             const BigramProperty *const bigramProperty);
 
-    bool removeNgramEntry(const PrevWordsInfo *const prevWordsInfo, const int *const word1,
-            const int length1);
+    bool removeNgramEntry(const PrevWordsInfo *const prevWordsInfo,
+            const CodePointArrayView wordCodePoints);
 
     bool flush(const char *const filePath);
 
@@ -105,8 +106,7 @@ class Ver4PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
     void getProperty(const char *const query, const int queryLength, char *const outResult,
             const int maxResultLength);
 
-    const WordProperty getWordProperty(const int *const codePoints,
-            const int codePointCount) const;
+    const WordProperty getWordProperty(const CodePointArrayView wordCodePoints) const;
 
     int getNextWordAndNextToken(const int token, int *const outCodePoints,
             int *const outCodePointCount);
diff --git a/native/jni/src/utils/int_array_view.h b/native/jni/src/utils/int_array_view.h
index 53f2d2971..8797b5944 100644
--- a/native/jni/src/utils/int_array_view.h
+++ b/native/jni/src/utils/int_array_view.h
@@ -105,6 +105,7 @@ class IntArrayView {
 
 using WordIdArrayView = IntArrayView;
 using PtNodePosArrayView = IntArrayView;
+using CodePointArrayView = IntArrayView;
 
 } // namespace latinime
 #endif // LATINIME_MEMORY_VIEW_H