By default the automatic language detection is enabled. There may be cases when the language detection tool doesn't recognize the language correctly especially for languages of the same language group, loan-words or short text.
1. If you know the language of the original text, you can select the language from the source language drop-down list and mark the "Lock-in language" checkbox to secure your language choice.
This checkmark temporarily disables the language detection and keeps your language settings for this translation session.
2. To permanently disable the automatic language detection and set the translation direction manually, use ImTranslator Options.
If you want to re-enable the language detection function, choose "Detect language" from the source language drop-down menu on the translation application. This setting will be valid for the current page and the browser's session.
If you want to keep these settings, go to Options, make changes and save your settings.