de gruyter berlin new york kuznetsov sn theoretical foundations interlinguistics moscow university peoples friendship david j peterson art language invention horse lords dark elves words behind world building new york penguin pp external links plulingva https benjaminscom catalog lplp ''language problems language planning'' lplp een 'peer reviewed international multilingual journal devoted study multilingualism language policy' en heeft geregeld een rubriek https benjaminscom catalog lplp interlinguistics interling stica interlinguistik interlingvistiko de en '' sterreichische nationalbibliothek nb https wwwonbacat en library departments planned languages holdings searching collections department planned languages
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