The steps to do that are these:

-You need a linux environment (I'm using Archlinux, but Ubuntu or some other works too)

- You need to download the tarball first: http://git.tuxfamily.org/okboard/okb...master.tar.bz2 and uncompress it at your /home directory

- You need the dictionaries. I take it from https://github.com/titoBouzout/Dictionaries but it needs to be adjusted, so I attach the file already processed (see Spanish.dic.txt.zip on this post)

-You need the corpora files of your language (e.g. Spanish)
http://corpora2.informatik.uni-leipzig.de/download.html
http://www.cs.upc.edu/~nlp/wikicorpus/
http://opus.lingfil.uu.se/OpenSubtitles2016.php
http://www.lllf.uam.es/ESP/Corlec.html
https://tatoeba.org/spa/downloads

Take in mind this tip to make your corpora files:
Corpora file =< 4GB for 16GB RAM Computers
Corpora file =< 1,5GB for 8GB RAM Computers

- You need the "aspell-es" package (in case of Spanish) instaled from the repos of your distro.

- You need "lbzip2" package installed on your system too.

-You need "rsync" installed on your system.

-You need "QT5" installed on your system.

-You need "python3-dev" installed on your system.

- Now you need to create a folder somewhere and put the dictionary inside (e.g. /home/USERNAME/okboard/langs)

-If you have several corpora files, then:

- Open a terminal window

- And set the two environment variables:

- You can see those variables with

if you're curious

- You need to compress the file (corpus-es.txt) you put before in /home/username/okboard/langs:

- Now should be named corpus-$LANG.txt.bz2 In our case: corpus-es.txt.bz2 because of Spanish

- There should be a single file inside.

- The next thing is to do is to move in okboard files inside the same Terminal window in our case "/home/username/okb-engine-master/". Here is the okboard's source code.

- In 'db' folder you must create a lang-es.cf file first. You can copy it from another .cf file in the same folder (e.g. copy lang-en.cf and rename it into lang-es.cf)

-And left only ASCII characters on those files:

Then move the corpus-es.txt original file to a safe place:

And rename the cleaned file fro non valid ASCII characters to the proper name to start the process:

- Execute ("es" in case of Spanish)

- After this, the script creates the dictionaries for OKBoard in path /home/USERNAME/okboard/langs/ :

add-words-es.txt
affixes-es.txt
clusters-es.log
clusters-es.txt
corpus-es.txt.bz2
db.version
es-full.dict
es-full.tre
es-learn.txt.bz2
es-predict.dict
es-test.txt.bz2
es.tre
grams-es-full.csv.bz2
grams-es-learn.csv.bz2
grams-es-test.csv.bz2
lang-es.cf
ngrams-es.rpt
predict-es.db
predict-es.id
predict-es.ng
predict-es.rpt.bz2
predict-es.txt.bz2
tmp-words-es.txt

- So, now we have the Spanish dictionary created.

Now we have to compress in .gz the files OKBoard will use to swype our texts:

Now, connect the phone via ssh to the computer as I explain here: http://www.linuxleon.org/2015/09/how...jolla-con.html

And follow these instructions to create RPM package directly on your Sailfish phone: http://talk.maemo.org/showthread.php?t=92963

After that, place .gz files onto phone: