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%lang-variant-atts; Multi-lingual Language Variant Attributes

Parameter entity collecting the two attributes @lang-variant and @lang-variant-custom, for easy access and removal together.
Declaration
<!ENTITY % lang-variant-atts
            "lang-variant 
                        (%lang-variant-types;)            #IMPLIED
             lang-variant-custom 
                        CDATA                             #IMPLIED"  >
Expanded Declaration

lang-variant (original | translation | interpretation | transcription | transliteration | phonetic | spoken | unknown | custom) #IMPLIED lang-variant-custom CDATA #IMPLIED