“Artificial language” in Japanese
Short answer
Artificial language in Japanese is “人造語” (jinzougo). Full meaning: artificial language.
Other ways to say “Artificial language” in Japanese
人工語
jinkougo artificial language
人工言語
jinkougengo artificial language (e.g. Esperanto), constructed language, conlang; language for defining structures, logic, etc. (e.g. XML, HTML, etc.)
Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.