Starting with the recent update, Instagram is going to add support for right to left languages. The current update includes language support for three major bidirectional language: Hebrew, Arabic and Farsi.
To change your app’s language to Hebrew, Arabic or Farsi, head over to in app settings and tap on Languages option. From there you can choose your preffered language.
This new language options seems to be wokring only in the latest update, so make sure you have the update app: