Looks like you are using CKEditor. The one from the default installation?
If so, you need to edit the config.js in the wysiwyg-editor folder and add this line:
config.language = 'fr';
fr would be French, add your language abbreviation.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.
April 20, 2021: Q2A 1.8.6 released!