diff --git a/app/ns.ttl b/app/ns.ttl
index 32119d1..211abf0 100644
--- a/app/ns.ttl
+++ b/app/ns.ttl
@@ -30,6 +30,11 @@
 @prefix schema: <https://schema.org/> .
 @prefix locn:   <http://www.w3.org/ns/locn#> .
 @prefix ltlod:  <http://linkeddata.lt/ns#> .
+@prefix rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+@prefix geo:    <http://www.w3.org/2003/01/geo/wgs84_pos#> .
+@prefix rov:    <http://www.w3.org/ns/regorg#> .
+@prefix skos:   <http://www.w3.org/2004/02/skos/core#> .
+@prefix dh:     <https://www.w3.org/ns/ldt/document-hierarchy#> .
 
 : a owl:Ontology ;
     rdfs:label "LTLOD namespace" .
@@ -60,6 +65,47 @@ ltlod:ElectoralDistrict a owl:Class ;
     rdfs:label "Rinkimų apygarda"@lt, "Electoral district"@en ;
     rdfs:isDefinedBy : .
 
+# Remaining classes used as rdf:type on data — labelled here (single source of
+# truth) so files/overrides.xsl can surface them on the type badges. LDH does not
+# consult this ontology for rdf:type objects on its own (only for predicates), so
+# the badge localisation is bridged in XSLT — but the label text lives here.
+
+org:FormalOrganization a owl:Class ;
+    rdfs:label "Formalioji organizacija"@lt, "Formal organization"@en ;
+    rdfs:isDefinedBy : .
+
+rov:RegisteredOrganization a owl:Class ;
+    rdfs:label "Registruotas juridinis asmuo"@lt, "Registered organization"@en ;
+    rdfs:isDefinedBy : .
+
+org:Site a owl:Class ;
+    rdfs:label "Buveinė"@lt, "Site"@en ;
+    rdfs:isDefinedBy : .
+
+locn:Address a owl:Class ;
+    rdfs:label "Adresas"@lt, "Address"@en ;
+    rdfs:isDefinedBy : .
+
+dct:Location a owl:Class ;
+    rdfs:label "Vietovė"@lt, "Location"@en ;
+    rdfs:isDefinedBy : .
+
+skos:Concept a owl:Class ;
+    rdfs:label "Sąvoka"@lt, "Concept"@en ;
+    rdfs:isDefinedBy : .
+
+skos:ConceptScheme a owl:Class ;
+    rdfs:label "Sąvokų schema"@lt, "Concept scheme"@en ;
+    rdfs:isDefinedBy : .
+
+dh:Item a owl:Class ;
+    rdfs:label "Dokumentas"@lt, "Document"@en ;
+    rdfs:isDefinedBy : .
+
+dh:Container a owl:Class ;
+    rdfs:label "Katalogas"@lt, "Container"@en ;
+    rdfs:isDefinedBy : .
+
 # properties
 
 dct:isPartOf a owl:ObjectProperty ;
@@ -124,6 +170,153 @@ org:memberDuring a owl:ObjectProperty ;
     rdfs:label "Laikotarpis"@lt, "During"@en ;
     rdfs:isDefinedBy : .
 
+# standard-vocabulary property labels (label-only, no view). LDH resolves the
+# property-column label of every predicate on a page by DESCRIBE-ing it against
+# this ontology ({base}ns) and language-negotiating the rdfs:label — so a bare
+# rdfs:label here is enough to Lithuanianise a FOAF/DC/schema.org/… predicate that
+# otherwise falls back to its (English) source-vocab label or capitalised local
+# name. Bilingual on purpose: Lithuanian to lt clients, English to en clients.
+
+foaf:depiction a rdf:Property ;
+    rdfs:label "Atvaizdas"@lt, "Depiction"@en ;
+    rdfs:isDefinedBy : .
+
+foaf:img a rdf:Property ;
+    rdfs:label "Paveikslėlis"@lt, "Image"@en ;
+    rdfs:isDefinedBy : .
+
+foaf:name a rdf:Property ;
+    rdfs:label "Vardas ir pavardė"@lt, "Name"@en ;
+    rdfs:isDefinedBy : .
+
+foaf:givenName a rdf:Property ;
+    rdfs:label "Vardas"@lt, "Given name"@en ;
+    rdfs:isDefinedBy : .
+
+foaf:familyName a rdf:Property ;
+    rdfs:label "Pavardė"@lt, "Family name"@en ;
+    rdfs:isDefinedBy : .
+
+foaf:gender a rdf:Property ;
+    rdfs:label "Lytis"@lt, "Gender"@en ;
+    rdfs:isDefinedBy : .
+
+foaf:mbox a rdf:Property ;
+    rdfs:label "El. paštas"@lt, "Personal mailbox"@en ;
+    rdfs:isDefinedBy : .
+
+foaf:phone a rdf:Property ;
+    rdfs:label "Telefonas"@lt, "Phone"@en ;
+    rdfs:isDefinedBy : .
+
+foaf:isPrimaryTopicOf a rdf:Property ;
+    rdfs:label "Aprašoma dokumente"@lt, "Is primary topic of"@en ;
+    rdfs:isDefinedBy : .
+
+foaf:primaryTopic a rdf:Property ;
+    rdfs:label "Pagrindinė tema"@lt, "Primary topic"@en ;
+    rdfs:isDefinedBy : .
+
+foaf:topic a rdf:Property ;
+    rdfs:label "Tema"@lt, "Topic"@en ;
+    rdfs:isDefinedBy : .
+
+owl:sameAs a rdf:Property ;
+    rdfs:label "Sutampa su"@lt, "Same as"@en ;
+    rdfs:isDefinedBy : .
+
+dct:identifier a rdf:Property ;
+    rdfs:label "Identifikatorius"@lt, "Identifier"@en ;
+    rdfs:isDefinedBy : .
+
+dct:title a rdf:Property ;
+    rdfs:label "Pavadinimas"@lt, "Title"@en ;
+    rdfs:isDefinedBy : .
+
+dct:type a rdf:Property ;
+    rdfs:label "Tipas"@lt, "Type"@en ;
+    rdfs:isDefinedBy : .
+
+cv:level a rdf:Property ;
+    rdfs:label "Lygmuo"@lt, "Level"@en ;
+    rdfs:isDefinedBy : .
+
+geo:lat a rdf:Property ;
+    rdfs:label "Platuma"@lt, "Latitude"@en ;
+    rdfs:isDefinedBy : .
+
+geo:long a rdf:Property ;
+    rdfs:label "Ilguma"@lt, "Longitude"@en ;
+    rdfs:isDefinedBy : .
+
+schema:validFrom a rdf:Property ;
+    rdfs:label "Galioja nuo"@lt, "Valid from"@en ;
+    rdfs:isDefinedBy : .
+
+schema:validThrough a rdf:Property ;
+    rdfs:label "Galioja iki"@lt, "Valid through"@en ;
+    rdfs:isDefinedBy : .
+
+schema:foundingDate a rdf:Property ;
+    rdfs:label "Įsteigimo data"@lt, "Founding date"@en ;
+    rdfs:isDefinedBy : .
+
+schema:dissolutionDate a rdf:Property ;
+    rdfs:label "Likvidavimo data"@lt, "Dissolution date"@en ;
+    rdfs:isDefinedBy : .
+
+skos:prefLabel a rdf:Property ;
+    rdfs:label "Pavadinimas"@lt, "Preferred label"@en ;
+    rdfs:isDefinedBy : .
+
+skos:altLabel a rdf:Property ;
+    rdfs:label "Alternatyvusis pavadinimas"@lt, "Alternative label"@en ;
+    rdfs:isDefinedBy : .
+
+skos:notation a rdf:Property ;
+    rdfs:label "Žymuo"@lt, "Notation"@en ;
+    rdfs:isDefinedBy : .
+
+skos:exactMatch a rdf:Property ;
+    rdfs:label "Tikslus atitikmuo"@lt, "Exact match"@en ;
+    rdfs:isDefinedBy : .
+
+skos:scopeNote a rdf:Property ;
+    rdfs:label "Taikymo pastaba"@lt, "Scope note"@en ;
+    rdfs:isDefinedBy : .
+
+skos:inScheme a rdf:Property ;
+    rdfs:label "Priklauso schemai"@lt, "In scheme"@en ;
+    rdfs:isDefinedBy : .
+
+skos:topConceptOf a rdf:Property ;
+    rdfs:label "Viršutinė schemos sąvoka"@lt, "Top concept of"@en ;
+    rdfs:isDefinedBy : .
+
+rov:legalName a rdf:Property ;
+    rdfs:label "Registruotas pavadinimas"@lt, "Legal name"@en ;
+    rdfs:isDefinedBy : .
+
+rov:orgStatus a rdf:Property ;
+    rdfs:label "Teisinis statusas"@lt, "Organization status"@en ;
+    rdfs:isDefinedBy : .
+
+rov:companyType a rdf:Property ;
+    rdfs:label "Teisinė forma"@lt, "Company type"@en ;
+    rdfs:isDefinedBy : .
+
+org:hasRegisteredSite a rdf:Property ;
+    rdfs:label "Registruota buveinė"@lt, "Has registered site"@en ;
+    rdfs:isDefinedBy : .
+
+org:siteAddress a rdf:Property ;
+    rdfs:label "Adresas"@lt, "Site address"@en ;
+    rdfs:isDefinedBy : .
+
+locn:postCode a rdf:Property ;
+    rdfs:label "Pašto kodas"@lt, "Post code"@en ;
+    rdfs:isDefinedBy : .
+
 # views
 # Territorial hierarchy: children point up via dct:isPartOf, every parent is a
 # cv:AdminUnit, so one view covers county→municipalities, municipality→
diff --git a/files/overrides.xsl b/files/overrides.xsl
index 7842acc..cb0cc53 100644
--- a/files/overrides.xsl
+++ b/files/overrides.xsl
@@ -32,6 +32,7 @@
     <!ENTITY time   "http://www.w3.org/2006/time#">
     <!ENTITY foaf   "http://xmlns.com/foaf/0.1/">
     <!ENTITY gsp    "http://www.opengis.net/ont/geosparql#">
+    <!ENTITY skos   "http://www.w3.org/2004/02/skos/core#">
 ]>
 <xsl:stylesheet version="3.0"
     xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
@@ -40,6 +41,7 @@
     xmlns:time="&time;"
     xmlns:foaf="&foaf;"
     xmlns:gsp="&gsp;"
+    xmlns:skos="&skos;"
     xmlns:ac="https://w3id.org/atomgraph/client#"
     xmlns:ldh="https://w3id.org/atomgraph/linkeddatahub#"
     xmlns:bs2="http://graphity.org/xsl/bootstrap/2.3.2"
@@ -65,4 +67,17 @@
          in resource.xsl (empty bs2:PropertyList template on the predicate element). -->
     <xsl:template match="gsp:asWKT" mode="bs2:PropertyList"/>
 
+    <!-- ac:label for skos:altLabel — the base client stylesheets cover rdfs:label,
+         dc:title and skos:prefLabel but not skos:altLabel; add it as a language-
+         negotiated fallback (only when no skos:prefLabel), so a concept carrying
+         only an altLabel labels instead of showing its URI. -->
+    <xsl:template match="*[not(skos:prefLabel/text())][skos:altLabel[some $lang in $ac:langs satisfies lang($lang)]/text()]"
+                  mode="ac:label" priority="0.6">
+        <xsl:sequence select="(for $lang in $ac:langs return skos:altLabel[lang($lang)])[1]/text()"/>
+    </xsl:template>
+
+    <xsl:template match="*[not(skos:prefLabel/text())][skos:altLabel/text()]" mode="ac:label" priority="0.4">
+        <xsl:sequence select="(skos:altLabel[not(@xml:lang)], skos:altLabel)[1]/text()"/>
+    </xsl:template>
+
 </xsl:stylesheet>