Hi Maya_Carolina, thank you for posting in Apple Support Communities.
Can I suggest that you update to the latest iPadOS 15.3 (if you have not done this already) as updates can help resolve some problems. The following link can help you:
https://support.apple.com/en-au/HT204204
Can I also suggest that you check your keyboard language to ensure it is correct as follows:
Settings > General > Keyboard > Keyboards e.g. QUERTY etc, and also
Settings > General > Keyboard > Hardware Keyboard to ensure it is set to the correct country.
https://support.apple.com/en-au/guide/ipad/ipad1aa5a19a/ipados
You can also check that your iPad is set to the correct language and region as follows:
Settings > General > Language & Region > iPad Language
https://support.apple.com/en-au/HT204031
Sometimes a 'Force Restart' can also resolve these issues as per the following link:
https://support.apple.com/en-au/guide/ipad/ipad9955c007/ipados
However, you can also contact Apple Support as follows: