This could be caused by the following.
- If profile registration was not registered properly, it will not be applied.
- If text including parentheses is registered in the source language, it will not be reflected in the translation for English-Japanese translation
(if only one character is between the parentheses it will be applied, but will not be applied if there are two or more characters).
- If there is no match with the registered entry (including the case of the entry), it will not be applied.
- For Japanese-English translation, words of three letters or less will be translated as they are.
Also refer to "Translation Tips".