Fix typos and add missing French translations in fr.yml

[martygraphy]

This merge request fixes the issue described in #130. It addresses the following:

• Corrects typos in the French translation (fr.yml).
• Adds missing keys from the English translation (en.yml).
• Aligns the structure of the French translation with the English file to ensure consistency and ease of maintenance.

This will improve the user experience for French-speaking users by providing more accurate and consistent translations.