In MySQL, certain characters are considered the same when performing searches, e.g. 'n' and 'ñ'; unless you specify BINARY in the condition.
Is there a list somewhere of the characters that are considered the same?
Case or accent sensitivity behavior is defined by the collation you are using.
If you find your collation in that list you will see a chart of comparable characters.
Here is a summary of the utf8 collations: http://mysql.rjweb.org/utf8_collations.html
It shows that 'n' and 'ñ' are considered equal for all but
utf8_spanish_ci In the Spanish cases,
ñ are treated like a separate letter and sort after
nz and before
(Latvian and Polish have a couple of flavors of
n that work like the Spanish
ñ; but perhaps that is in of importance to you.)