siriushoward wrote:

Logged in users are able to configure their preference of language variant. Once configured and logged in, all links remains as the default no-variant-specified url but the content displayed is of the language variant.

Using zh-tw as example. A logged in user with preference set to zh-tw will see all /wiki/xxxxxxx pages as if /zh-tw/xxxxxxx is requested. But all links still points to /wiki/xxxxxxx

1. When not logged in, users need to switch language variant on every page.

2. Logging in is not always possible, such as using public computers.

3. Users seeing different content/variant on the same url. Consider a user sending a url to another

Also found a recent conversation on this topic: www.gossamer-threads.com/lists/wiki/wikitech/281923

I'm considering storing user preference automatically on variant switch. Maybe this can be a solution for this bug?

See also: https://zh.wikipedia.org/w/index.php?oldid=26519379#.E8.AF.AD.E8.A8.80.EF.BC.88.E7.B9.81.E7.AE.80.2F.E5.9C.B0.E5.8C.BA.E8.AF.8D.3Dvariant.EF.BC.89.E8.BD.AC.E6.8D.A2.E5.99.A8.E5.81.8F.E5.A5.BD.E8.AE.BE.E5.AE.9A.E7.9A.84.E8.AE.BE.E8.AE.A1.E4.BF.AE.E6.94.B9

In T29838#329948, @liangent wrote:

I'm considering storing user preference automatically on variant switch. Maybe this can be a solution for this bug?

See also: https://zh.wikipedia.org/w/index.php?oldid=26519379#.E8.AF.AD.E8.A8.80.EF.BC.88.E7.B9.81.E7.AE.80.2F.E5.9C.B0.E5.8C.BA.E8.AF.8D.3Dvariant.EF.BC.89.E8.BD.AC.E6.8D.A2.E5.99.A8.E5.81.8F.E5.A5.BD.E8.AE.BE.E5.AE.9A.E7.9A.84.E8.AE.BE.E8.AE.A1.E4.BF.AE.E6.94.B9

I think it's not a complex problem. Maybe it just set wrong Accept-Language on browser with identity of a registered User. He needs to set the Accept-Language as series of 'zh-'. To Set The Accept-Language, Ask Google.