I tried Maurice Matheeussen's solution, but that did not work for me. I can't find a models directory. Can you help me out? Thanks.

In the mean time I have found a solution myself

add a file ir_http.py with the following content to the website_language_flags module in the models directory.

import openerp

from openerp.osv import orm, osv, fields

from openerp.http import request

class ir_http(orm.AbstractModel):

_inherit="ir.http"

def get_nearest_lang(self, lang):

# Try to find a similar lang. Eg: fr_BE and fr_FR

if lang in request.website.get_languages():

return lang

short = lang.split('_')[0]

for code, name, lang_obj in request.website.get_languages():

if code.startswith(short):

return code

return False

ir_http()

I do not have a crystal ball, so unfortunately I'm not able to look into your odoo server's log file.