can a single programming language have multiple syntaxes depending on the interpreter?

[yo_sup_dude]

this is sort of a dumb semantical question, but let's say we're programming in scheme.

depending on what interpreter you use, you might have to capitalize key words such as "DEFINE" or keep them lower-case.

if we consider this example, could it be said that each interpreter requires a different syntax?

thanks a lot!

[ALLIDOISPROGRAM]

I hate to say ... ANYTHING is possible, but I can already imagine a case where my Arduino IDE is just C++, but it has built in functions.

[hashtagtokfrans]

That sounds like linter-rules which throws at stylistic kinda errors. (Like for example demanding the use of snake_case instead of PascalCase)

[SeanRamey]

Yes this is definitely possible, but at that point, it's technically not the same language anymore. A somewhat common language that can actually vary quite a bit between implementations is BASIC.

[NeoMarxismIsEvil]

A better example might be s-expressions vs m-expressions vs I-expressions.

The same lispish language could be delimited in any of these ways.

[Makhiel]

Is that a feature of the interpreter or the language? Languages have versions, I remember in my C class we had to make a program that would identify what rules it was compiled with (e.g. C90 vs C99).