Who Can I Trust?

[Saimin]

@Saimin

What Leebo said, but here’s a bit more info on the “official” radicals, with links to some interesting articles:

@Saimin

The “official” radicals come from the 18th century chinese Kangxi dictionary, and not even all the 214 are in use in Japanese.
There are a few commonly-used nicknames, but no official ones, according to the article below.
Some Japanese language tests especially for natives do ask you to identify this “main radical” of a kanji though, i think.
And you can look up Kanji in most dictionaries using their main radical, but you don’t need names for that.
https://kanjialive.com/214-traditional-kanji-radicals/

There’s also an article about it from Tofugu, also explaining how some radicals were named.
They don’t put it as directly as above, but they also put “official” in quotation marks.
See the “Identifying the Radical” section.
Learn Kanji with Radicals and Mnemonics: The Definitive Guide