This depends on whether that language was consistent with my experience of other languages. I've no problem learning a new language, and having TCL, PERL, C, C

This depends on whether that language was consistent with my experience of other languages. I've no problem learning a new language, and having TCL, PERL, C, C#, Java, Python and JavaScript in my arsenal I wouldn't be intimidated by having something new presented and being expected to pick it up. The real issue for me would be the question: What motivated you to create a new language? What problem set did you feel that you have that isn't addressed by existing languages? And if this language is a domain-specific one, I would want to know what made your domain so special? I would basically fear that a "Not Invented Here" mentality led to the creation of the language, and that would strongly discourage me from going further. On a secondary point, it would also depend on the type of position it was. If it was a startup, language would not be an issue. But for a contract position the language may well limit future opportunities and so it would matter.