The phrase "foreign word" used in the image below is a mistranslation of the German Fremdwort, which refers to loanwords whose pronunciation, spelling, inflection or gender have not been adapted to the new language such that they no longer seem foreign. Such a separation of loanwords into two distinct categories is not used by linguists in English in talking about any language. Basing such a separation mainly on spelling is (or, in fact, was) not common except amongst German linguists, and only when talking about German and sometimes other languages that tend to adapt foreign spellings, which is rare in English unless the word has been widely used for a long time.
Weinreich (1953: 47ff.) differentiates between two mechanisms of lexical interference, namely those initiated by simple words and those initiated by compound words and phrases. Weinreich (1953: 47) defines simple words "from the point of view of the bilinguals who perform the transfer, rather than that of the descriptive linguist. Accordingly, the category 'simple' words also includes compounds that are transferred in unanalysed form". After this general classification, Weinreich then resorts to Betz's (1949) terminology.
The English language has borrowed many words from other cultures or languages. For examples, see and Anglicisation.