There are a number of joint honours courses in psychology and linguistics (and related fields e.g. language sciences). Off the top of my head, there's Oxford (PPL), UCL (psychology and language sciences), Edinburgh (cognitive sciences humanities route), I think York, and probably several others.
English literature is a very different subject, and is often just referred to as "English" at degree level. I would suggest that you don't search for "English language" courses, search for "linguistics" courses.
That said your degree subject doesn't really have that much bearing on your career. Most graduates go into careers unrelated to their degrees and most employers don't care what you studied unless applying to a specialist role requiring a specific background (e.g. engineering roles, healthcare roles, etc).
Doing a joint honours with psychology isn't going to make any difference to employability or even add any specific roles you could pursue - best case scenario if it's a BPS accredited joint honours then you could potentially pursue postgraduate study for a professional psychologist qualification (e.g. DClinPsy, masters in forensic psych, etc). Do it if you're interested in the field conceptually, don't otherwise.