Note that in spite of being hosted at a university URL, this is not reliable as fact: these are unsourced and are well known apocryphal texts that have floated around forever and been attributed to various other countries.
In any event, it is striking that examples of comical English are becoming rarer and rarer as machine translation has improved, and younger hotel staff in so many countries today grew up on the internet and are often proficient English speakers.
Yeah these "signs" are almost 100 years old now: "This text first appeared in an engineering journal in about 1919"[0]. Ngram Viewer and newspapers.com confirm that.
[0] https://www.reddit.com/r/engrish/comments/vhler2/motorcycle_...
On the language proficiency tangent: I wonder if there are collections of unintentionally funny $LINGUA_FRANCA back in the days of French, Classical Latin, Ancient Chinese, and Ancient Arabic.