Description:
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Summary is self explenatory;
aditional info:
<previous bugs check>
this is not a language selection/default issue; the pages use more than one language, looks like midway populating the entry, the documentation engine switches illegaly, i dont think its a misstranslation issue either
</previous bugs check>

i am beeing force rerouted to ve2 subdomain

the errors seem to be more related to how the manual constructs content than translations per se, entire paragraphs may switch to english, left hand side menues are also affected, 
most common to be cross-language are manual's segment subtitles (Warning pink boxes, function parameter definitions)

a sample link (i have seen many) with this issue

http://ve.php.net/manual/es/internals2.php 

wildguess: consolidating the language parameters; pool ip, mirror,browser preferences,etc and get only one working language variable for the rest of the populate process should lessen the amount of cross language pages.

Reproduce code:
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none

Expected result:
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none

Actual result:
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none