AdultLingo

AdultLingo offers free, Duolingo-style language lessons focused on flirting, dating, romance, slang, and swearing in Spanish, Chinese, and Japanese. It targets adult learners looking to understand real-life conversational language that traditional textbooks skip, including consent and intimate vocabulary. The web-based courses require no signup, keep user progress locally, and include interactive lessons with multiple choice, sentence building, and chat simulations.