Need help: keystroke combinations for accents don't work in some situations

I am learning Spanish and often need to use accented vowels or the Spanish letter "ene" (n with the ~ over top).

Note that in some apps, like Wordpad and Notepad, I can just hold ctrl, hit apostrophe and then a, e, i, o or u to get the vowel with the accent over top, or ctrl shift tilde and then n to get "ene" (as per https://support.microsoft.com/en-us/office/keyboard-shortcuts-to-add-language-accent-marks-in-word-and-outlook-3801b103-6a8d-42a5-b8ba-fdc3774cfc76). However, that does not work (ironically and most frustratingly) on the Deepl translation site (deepl.com) or at several sites I tried; including here.

To date, the only way I have found to do this is to install and use the Spanish keyboard (hold Windows key and then hit space bar until get the language keyboard I want), then left square open bracket for accent on vowels. Semicolon for n plus ~ . To get an actual semicolon is shift plus , (comma). Colon is shift plus . (period). + (plus sign) is close square bracket. Many other symbols are also changed with Spanish keyboard. This is not user friendly (unless of course it is the keyboard you would use all the time as a Spanish speaker).

It is noteworthy too that the ALT + (four digit codes) don't work for me anywhere. On web sites, nothing happens. In Notepad and Wordpad, hitting Alt plus 0 (zero) causes menu options to be invoked (that is, I don't even get all the way through typing ALT + 0160 for example). On a forum I posted this problem to earlier, somebody responded and they were able to use these four digit codes to create the accented letters (note that I really would rather not have to memorize a bunch of four digit codes but instead be able to use the <CTRL + ', letter> technique; this is more of an observation and maybe (maybe?) a clue to why the <CTRL + ', letter> feature doesn't work everywhere).

So actually a second workaround, only slightly nicer, is to type the Spanish with the accents and tildes in Notepad or Wordpad, then copy and paste it into deepl or other sites where <CTRL + ', letter> doesn't work; as I did here for the Spanish word for "more".

más

I forgot to mention, I am running Windows 11 Home on an Asus Zenbook 14 Flip.

Is there a way to create accents on a windows US English keyboard that works in all cases? Is there some setting I have to change somewhere?

Thanks!