This sentence contain a grammatical error:

日曜日にはたいてい、遅いおきます。
(I usually wake up late on Sundays)

Is a particle missing? I’m not sure what is wrong.
は 日本語 で何と言いますか？

質問を翻訳

You made a mistake with the word “遅い”. This is an adjective which can only describe a noun or stand on its own, but you want to describe the verb “おきます” which should be done with an adverb and the adverbial form of “遅い” is “遅く”. So the sentence should be: 日曜日にたいてい遅くおきます。