I think the easiest way is to create a MODX - lexicon-entry for contact in each language
and use lexicon - tags (uncached!):
[[!%contact]]
[[%key? &topic=`topicname` &namespace=`namespace_name` &language=`en`]]
$contents .= $modx->runSnippet('pdoResources',array(
'parents' => '-1',
'tpl' => 'productpage',
'resources' => $value,
'limit' => '0',
'hideContainers' => '1',
'includeContent' => '1',
'includeTVs' => 'mml_pagetitle,mml_introtext,product_image,price,consumerprice,promoprice,Termsofdelivery,PaymentTerms,opmerkingen_last,mml_productcontents,mml_technicalinformation,mml_productdescription',
'debug' => '0',
'sortby' => 'FIELD(modResource.id, '.$value.' )',
'sortdir' => 'ASC',
'prepareTVs' => '1',
'loadModels' => 'migxmultilang',
'prepareSnippet' => 'mmlTranslatePdoToolsRow'
));[[!getImageList? &limit=`1` &docid=`[[+id]]` &tvname=`product-specs` &tpl=`SpecsTableRows.getImageList` ]]
[[+mml_productdescription]]
[[+field1_[[++cultureKey]]]]
[[!getImageList?
&limit=`1`
&docid=`[[+id]]`
&tvname=`product-specs`
&value=`[[+tv.product-specs]]`
&tpl=`SpecsTableRows.getImageList`
]]
First home page (url above) works properly. I've tried to move on to the about page but language switch doesn't work- it simply redirects to a page without en or se. ...
what is the generated link?
what is the cultureKey of this context?
what is the base_url of this context?

<base href="[![!++site_url]]">