What is the meaning of -ido?

Attached to a the name of a language (typically a constructed language) to denote a conlang derived from or based on that language.

Used on countries or places to mean a descendant from that place

participle-forming suffix

adjective-forming suffix

forms the masculine singular past participle of 2nd-conjugation (-er) and 3rd-conjugation (-ir) verbs; -ed

forms the masculine singular past participle of regular -ir and -er verbs

creates nouns that describe sounds

-ide (member of a group of related compounds or elements)

Source: wiktionary.org

See also