This article advocates the reanalysis of historical data on extinct languages in the view of our current knowledge on the grammatical characteristics of possibly related languages.The example given here is a corpus of eight Arawakan languages of Bolivia, of which four are already extinct (Apolista, Joaquiniano, Paikoneka, Saraveka). Even though there are only wordlists available for these extinct languages, it is possible to analyze the data in the light of Arawakan grammar.Those aspects that can be excerpted from all data are taken as typological features in a questionnaire used for phylogenetic analyses. The graphs that result from the feature analysis deliver evidence for certain relations between the languages and those that are still spoken today, which again gives us some idea about the migration of the Arawakan languages, in general.

and Key Words The linguistic concept of complexity as a component of the CAF triad is used to describe the complexity of texts, either spoken (transcribed) or written, and to describe speaker advancedness not only in L1, but also in L2 research. On the most basic level, lexical complexity and syntactic complexity can be distinguished, however, complexity is a multidimensional concept and many different descriptions and operationalisations exist; there is an even wider gap in terms of measuring lexical complexity of L2 oral speech with lexical frequency wordlists as studies on lexical sophistication have yielded inconsistent and sometimes inconclusive results; the majority of studies on lexical sophistication, one of the subdivisions of lexical complexity, have been carried out on written learner production. For this reason, this thesis focuses on measuring lexical complexity in L2 speech with word frequency lists; more specifically, it presumes that C1 speakers would produce more of complex vocabulary (low-frequency vocabulary) than B2 speakers in our sample; this thesis also attempts to correlate word frequency list results with English Vocabulary Profile results and compare the individual speakers. For this analysis 10 B2 and 10 C1 Czech speakers of English were selected from the LINDSEI spoken...