OOV terms
include compound words, proper nouns and technical terms
[5]. In many documents technical terms and proper names
are important text elements. Dictionaries only include the
most commonly used proper nouns and technical terms used
such as major cities and countries. Their translation is crucial
for a good cross-language IR system. A common method
used to handle un-translatable keywords is to include the untranslated in the target language query. If this word does not
exist in the target language, the query will be less likely to
retrieve relevant documents.