Simlish

Simlish is the fictional language spoken by characters in The Sims video game series, created by Will Wright and Maxis. First appearing in SimCopter (1996) and popularized by The Sims (2000), Simlish was designed to convey emotion without real words, so players wouldn't tire of repetitive dialogue. Voice actors improvise using a mix of Ukrainian, Tagalog, and nonsense syllables. Real-world musicians including Katy Perry, Lily Allen, and Paramore have recorded songs in Simlish. It remains one of the most recognized constructed languages in pop culture.