Esperanto?
Esperanto is a language created in the 19th century that claims to be at least 4 times easier to learn than English. It features conventions that don’t have exceptions (eg: no conjugations of verbs, same suffix endings for tenses, prefixes/suffixes that can be added to anything to change meaning in a predictable fashion – such as “-ega” for emphasis). Don’t ask me how I came across this site. I don’t remember.