The key point here is that it's not an English-speaking country where being limited to English would be acceptable. There are official state languages, which h

The key point here is that it's not an English-speaking country where being limited to English would be acceptable. There are official state languages, which have official alphabets, which include non-English letters. There are legal names of people and organizations which include non-English letters. The law requires the bank to have and apply correct customer information, and spelling someone's official name wrong is simply not acceptable.