If it is deactivated, the problem is not on this module. And error shows something that is not on that module. It could be the content of a module.
In the page you are making your tests, try to move modules one by one to another page. The you will find the module causing this error.
If you disable all settings in DSLocalizator, the module does nothing, so you can begin with that.
Localization for DSLocalizator work fine with its own language selector. DNN one has a lot of errors. Some o them corrected on 3.2
All skins are converted to .ascx to run, so you can find the equivalent to [DSLOCALESELECTOR] in the skin folder where DNN uploaded my demo skin
Try those and let me know