Improvements to corpus

[Glitchy-Tozier]

A random collection of ideas that would improve usage or optimization.

• Add a README to /corpus, which explains where the sentences for those word-lists came from and what was done to them.
• Add a README to every folder, explaining what files were used in what proportions (for example, with which percentages does "deu_mixed_wiki_web…" incorporate "wiki" and "web"
• Include different countries for existing languages: Some collections (for example "web-public") separate the results into different countries.
  • English: I suggest taking files from the US, Great Britain, and Australia and weighting them 1:1:1.
  • German: As there's way less Austrians than Germans, we could tilt the weighting in favor of German corpora when adding "Austrian German". While I'd prefer going 1:1, I know many would not agree with this. Currently, the ratio of the two populations is roughly 9:1, so this might be an acceptable starting-point.
• In http://www.adnw.de/index.php?n=Main.Bewertungsverfahren, multiple sources of n-gram frequencies are mentioned. It would be interesting to incorporate some of them, to further solidify the validity of our corpus.

[iandoug]

Can't help with German but I did a corpus exercise last year for English. Get the latest versions of the PDF and .zip here:
https://zenodo.org/record/5501838

Also for Spanish, not as cleaned up as the English but better than straight from Leipzig:
https://zenodo.org/record/5501931