emes nisht sheker,
“the word “mabul” was in quotes (single quotes) because it was a hebrew word. If you look I put “environmentalists” in double quotes to give emphasis to that word. The single quotes was to indicate the change in language. Hope that makes sense.”
That is an atypical usage of quotation marks, and I have never seen them used in that manner before. Double-quotes are used for quoting, and single-quotes are used for quotes within quotes. For informal usage in forums like this one, quotation marks are frequently applied to words that are not actual quotes, with the intention of indicating doubt, casting aspersions, or to distancing the writer from what is written. For example, imagine a Trump supporter writing “Liz Cheney, the former ‘Republican’ representative from Wyoming”. The function of the quotes around Republican is to indicate that the writer does not believe she is a real Republican. Now imagine a Democrat writing “the annual ‘March for Life’ recently wrapped up in Washington, DC.” Again, March for Life was not a quotation, but the writer put it in quotes to imply that s/he does not support that name. This is how I initially interpreted your quotes, and it confused me.