We are one multilingual website and would like to ask about intro page, where registration/login form placed.
The question is about languages bar. We are going to support many languages 50+ and the question is:
Should we show most popular languages all the time and the More button somewhere next to them or to show just a language pic, by clicking which a nicely design div will appear to select any of 50 languages?
I would show six to nine languages, but NOT use any fancy half-assed scripting or CSS for the larger selection... send them to a real page to select from the massive list, that way you aren't wasting bandwith sending the massive list on every pageload.
Or, as Crusty said, your most commonly used languages and then a link to a dedicated page. If your link says "more" it should say "More languages" so that anyone pulling up a list of links on the page (there won't be the context of the other stuff around it).
Of course it might also be nice to offer a cookie to save last selected language so your most frequent users don't have to mess with language more than once. I recommend against using geo-location to set language unless it's really easy to find languages and switch. If you've ever used a hotel computer in another country before...
Basically, you're considering two possibilities: the user either has immediate access to to their language assuming the default you send them isn't theirs, OR they must take an action (a click) to reach a link to their language. I'd rather a real link to a new page than a dropdown unless you don't have a whole lot of languages, because a CSS-based dropdown means you'll lose keyboarders unless you want to do a bunch of extra CSS that, frankly, only retards like me bother doing. Usually, if stuff appears when you :hover, you only wrote for mice.
I would like to know only from presentation point of view to a user (call it usability). Let's forget about the traffic, js, css.
For the user, when he opens the site, and to get this user as a registered, should we show the most popular lang, 6-9 as deathshadow60 mentioned, or should we just show a link like "Change language" and show a popup (ajax-based) with all languages to choose from?
If this list is only available in a personal page where a registered user sets or edits their info, rather than a plain link available to visitors to the main page, I would do a regular form with dropdown (select). I suppose it depends on how your back-end is set up.
If this is before the user registers (and therefore available to everyone) then it may depend on how many languages you have and if your userbase is very skewed towards just a handful of languages.
I'm trying to find a study I read recently where it concluded it wasn't a good idea to mix the two (having some plain links and others hidden behind either a "more" style link or a dropdown). It had to do with "discoverability" and while the other languages were discoverable, many users seeing a list of languages tended to assume that was all there was.
Some questions to ask yourself:
Is this site based mostly in one or a handful of langauges but available to many more, or it is truly international?
(if it's the former, it might be okay to display some of the more popular languages out in the open)
Can any users set the language, or is this a setting available only to registered users?
(if anyone can, it should likely be obvious and easily discoverable to everyone. If it's only for registered users, less-discoverable inside a form control should be okay)
Are you going to use links with cookies/sessions, or form controls with a POST permanently setting the user's chosen langauge (no matter which computer they later log in from) until they change them again?
(if the former, I would still go with a list of all languages as links. If it's the latter, a select dropdown should be decent)
Other links: User Plus Design Pattern for language choice welie.com suggestions
Jakob Nielsen has a very old alertbox article which has the recommendation to list the languages in full if there are just a few, and to switch to some other method if there are many. However it's from 1996 and he's recommending flag icons and other icons, which since the 90's the UX community has strongly changed their minds (a flag is not a language; it's a country and many countries have multiple languages!) though he does have some commentary on the subject. One might think everyone knows the flag of the countries where people speak their language, but you'd be surprised especially if it turns out the flag you're using is outdated. See Iraq. Flags change. Also, multiple countries may have the same language as their official language. Which would you choose? Further details are in the first two links. When representing Chinese, do you use Chinese flag or Taiwan flag? How do you show the difference between Cantonese and Mandarin? How do you show Dutch versus French for Belgium? And some Belgians speak German.
Here is Paypal's attempts. It suffers many problems. One is, the form is in English. If I spoke and read Russian, I could probably guess the language selection because there is a flag (even if it's not a flag I recognise), but I wouldn't know which field was what without much scrolling through the options. If I see "Русский язык" then I could finally guess this was the country or region selection, and if I see "Русский" then I can guess that's language, but making me guess it kinda evil. So I don't like the form, and I think language selection should be separate from geographic location questions (least of all because you can't necessarily read the label or question until after you've chosen your language!).
Here you see HTC using a dedicated language page, listing all languages which is one click away. They place the language selection link in the upper-right-hand corner which is common enough (at least in the West) that people are very likely to look there when searching for langauge options (the second place being the footer). However note that the text next to the language name is "Selected language" in English. They also suggest using geo-location to auto-detect the language. Again, this sucks big hairy balls when you're an international traveller or an oppressed (language/cultural) minority, but if even language-selection instructions need to be in the chosen language, it can be nice to try to start on an appropriate language based on location and make it really easy for users who don't read that language to find where they can change it. Certainly once a user can get to a dedicated language page like HTC has, so long as each language is written *in* that language, most users should be able to find their own just fine.
Lenovo's decision to list countries makes less sense. How do I know what that means when it says United States? Is there a separate web site for Canadians, British, Irish, Australian, New Zealand and British Indians? Does it reflect the types and numbers of products shown due to availability?? Or is it purely a language selection?? Who knows?
You can see that it can get rather complicated.
If you can do actual user testing, that would help you the most.