1. Findings may be useful for cognitive scientists, theoretical linguists, computational linguists, developmental psychologists, educators, educational therapists, clinical scientists, parents and policymakers.

Die Erkenntnisse können für Kognitionswissenschaftler, theoretische Linguisten, Computerlinguisten, Entwicklungspsychologen, Lehrkräfte, Erzieher, pädagogische Therapeuten, klinische Wissenschaftler, Eltern und politische Entscheidungsträger von Nutzen sein.

2. Some linguists have claimed that these lexical suffixes provide only adverbial or adjectival notions to verbs. Other linguists disagree arguing that they may additionally be syntactic arguments just as free nouns are and thus equating lexical suffixes with incorporated nouns.

Seien a,b,c,... Elemente aus einem Alphabet , Seien v,w beliebige Zeichenketten über einem Alphabet.

3. We must distinguish it clearly from other forms of gradation which developed later, such as Germanic umlaut (man/men, goose/geese, long/length, think/thought) or the results of English word-stress patterns (man/woman, photograph/photography). Confusingly, in some contexts, the terms 'ablaut', 'vowel gradation', 'apophony' and 'vowel alternation' may be heard used synonymously, especially in synchronic comparisons, but historical linguists prefer to keep 'ablaut' for the specific Indo-European phenomenon, which is the meaning intended by the linguists who first coined the word.

Ein schwaches Verb ist z.B. loben, der Stammvokal ändert sich bei der Vergangenheitsbildung nicht: loben, lobte, gelobt.

4. The Aymara language does have one surviving relative, spoken by a small, isolated group of about 1000 people far to the north in the mountains inland from Lima in Central Peru (in and around the village of Tupe, Yauyos province, Lima department). This language, known as Jaqaru/Kawki, is of the same family as Aymara, indeed some linguists refer to it as 'Central Aymara', alongside the main 'Southern Aymara' branch of the family spoken in the Titicaca region.

Die Dialekte dort hätten sich allmählich nach Süden in den bolivianischen Altiplano ausgeweitet und seien später schließlich vor allem von den Inka stark beeinflusst worden.