A jocular imitation of the copula 'da' used to mimic Chinese-accented speech (often written in katakana). Used humorously or stereotypically in jokes and fiction.
昔のギャグマンガで中国人キャラが『そうアル』と言う描写がよくある。
Old gag manga often show Chinese characters saying 'sou aru'.
ジョークで『〜アル』と真似する人がいるが、場合によっては差別的に受け取られることもある。
Some people mimic by saying '~aru' as a joke, but depending on the context it can be perceived as discriminatory.