This is a great use case for regular expressions, and the regex engine that Airtable uses supports the [[:ascii:]]
character class, which will only match normal ASCII characters: letters, numbers, and limited special characters, but no emojis. This formula will replace anything not in that category with an empty string, but you can use whatever substitute character you prefer.
REGEX_REPLACE(Title, "[^[:ascii:]] *", "")

This was exactly what I needed. You da man! Thank you soooooo much.
Hi everyone,
Thank you very much for the formula.
However, it also removes accents.
My canadien customer René now has a first name of Ren.
Is there a way to remove emojis and keep accents ?
Hi everyone,
Thank you very much for the formula.
However, it also removes accents.
My canadien customer René now has a first name of Ren.
Is there a way to remove emojis and keep accents ?
This works even better for me:
REGEX_MATCH(Titel, ''^\\u0000-\\ud7ff\\ue000-\\uffff]')