The effect is that you will increase the learning level of difficulty by a higher number than the number of languages you want to learn.
One thing though, if those two languages have sinergy in a project you are building. Let's say an App that has PHP as back-end and JS as front-end, then I would say go for it, because I did that and it ended up been a good thing.
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
The effect is that you will increase the learning level of difficulty by a higher number than the number of languages you want to learn.
One thing though, if those two languages have sinergy in a project you are building. Let's say an App that has PHP as back-end and JS as front-end, then I would say go for it, because I did that and it ended up been a good thing.