Hello saif_abdelhamid,
Welcome to Microsoft Office Community Forum. Thank you for sharing your concern with us today and we hope that all is well.
We understand that you are having issues logging in because the language has change. Let’s us check on this together and sort this out. Rest assured, we will do anything in our capability to assist you with your concern.
However, we’d like to know more about it in details so that we can provide a more accurate resolution for you. To start, please provide us information on the following questions:
- Changes made before the issue happen?
Method 1: Try using the windows key + space bar method, You should see which keyboard is active at the bottom right hand side of the login screen. Cycle till you have the one you want, then type in your password.
Method 2: We can try searching from Bing for alt-code symbol combination for your language.
We look forward to your response. If you have other clarifications about this matter, you can get back to us by replying to this post.
Sincerely,
Carlo O.
Microsoft Community