One of the amazing features of the LanguageTool Plugin is advanced spell check. Spell-checking is done in batch mode, so it’s faster than a standard Studio spell check. Group ignoring errors is easier and safer. Unnecessarily ignored errors can be quickly restored, which cannot be done with a standard spell check in Studio.
And most importantly, we can detect errors in:
- proper names
- product names
- utranslatables
- source UI options when bilingual translated
- acronyms
- words in capital letters
- words in mixed letters
- words containing digits
- and alphanumeric expressions.
LanguageTool Plugin is smart spell checker for checking acronyms and alphanumeric expressions. This is how it works.

Error | Error detected by QA-checker | |||
Source | Target | LT Plugin | Number Verifier | Simple Numcheck |
ATmega168 | ATmeg168 | Yes | No | Yes |
ATmega328 | ATmega228 | Yes | Yes | Yes |
Arduino | Ardoino | Yes | No | No |
Due | Deu | Yes | No | No |
SAM3X8e | SAM38Xe | Yes | Yes | Yes |
LilyPad | LillyPad | Yes | No | No |
Any error detected by the LanguageTool Plugin is clearly indicated in the Message column. Any error detected by the LanguageTool Plugin is clearly highlighted in the Target column. You can be sure that you won’t mistakenly ignore the error returned by a standard spell checker in the Studio.
How to configure the LanguageTool Plugin to detect all such errors.

Notes in small print: not all errors listed above are detected by the LanguageTool Plugin by default. This depends on the default configuration of the speller of LanguageTool package. LanguageTool spell checker configuration is set in INFO file in dictionary folder:
c:\LanguageTool-4.3\org\languagetool\resource\en\hunspell\en-US.info (for en-US)
c:\LanguageTool-4.3\org\languagetool\resource\pl\hunspell\pl_PL.info (for pl-PL)
The first highlighted part is the path to the LanguageTool package, and the next highlighted parts are the given language.
Modified content of the INFO file
For pl-PL:
# Dictionary properties.
fsa.dict.separator=+
fsa.dict.encoding=UTF-8
fsa.dict.encoder=none
fsa.dict.frequency-included=true
fsa.dict.speller.locale=pl_PL
fsa.dict.speller.ignore-diacritics=true
fsa.dict.speller.ignore-all-uppercase=false
fsa.dict.speller.ignore-camel-case=false
fsa.dict.speller.ignore-numbers=false
fsa.dict.speller.ignore-punctuation=true
fsa.dict.speller.equivalent-chars=x ź, l ł, u ó, ó u, u y, i j, u ł, d t, v w, - —, - –, 0 O
fsa.dict.speller.replacement-pairs=ć dź, ć dz, c dz, ch h, dź ć, dz ć, ę em, ę en, em ę, en ę, h ch, osc ość, loz łos, ą oł, oł ą, ą om, om ą, ą on, on ą, ż rz, rz ż, rz sz, scia ścią, sić ść, sz ż, sz rz, tro rot, x ks, z rz, nei nie, trzcionk czcionk
For en-US:
# Dictionary properties.
fsa.dict.separator=+
fsa.dict.encoding=iso-8859-2
fsa.dict.encoder=SUFFIX
fsa.dict.speller.locale=en_US
fsa.dict.speller.ignore-diacritics=true
fsa.dict.speller.ignore-all-uppercase=false
fsa.dict.speller.ignore-camel-case=false
fsa.dict.speller.ignore-numbers=false
fsa.dict.speller.replacement-pairs=ninties 1990s, a ei, ei a, a ey, ey a, ai ie, ie ai, are air, are ear, are eir, air are, air ere, ere air, ere ear, ere eir, ear are, ear air, ear ere, eir are, eir ere, f ph, ph f, gh f, f gh, kw qu, Bordo Bordeaux, bato bateau, bocoup beaucoup, buro bureau, bo beau, oo ew, ew oo, ew ui, ui ew, oo ui, ui oo, uff ough, oo ieu, ieu oo, ier ear, ear ier, air ear, shun tion, shun sion, shun cion, yersa years, phoby phobia
fsa.dict.frequency-included=true
fsa.dict.speller.ignore-all-uppercase=false
For the Ignore words with UPPER CASE…, Ignore words with miXED CASE… and Ignore words with numbers… to work, there must be 3 highlighted lines in the language configuration file. If there are no lines or they are set to “true”, they must be changed accordingly.
Unfortunately, this will not work for all languages. Below is a table with the default settings of the LanguageTool spell checker module, which will help you easily check if you can change your settings. The FSA ignore params supported column indicates whether it is possible to change them in the INFO file. You can see that among the languages tested by me, it is not possible to set all three parameters only for Danish, German, Portuguese and Ukrainian. Nothing needs to be changed for Catalan, Dutch, Swedish, French. For other languages you can edit FSA parameters in INFO file.
LT Language Name |
LT Short Code |
LT Long Code |
FSA ignore params supported | Default ignore-all-uppercase | Default ignore-camel-case | Default ignore-numbers | Path to INFO file |
Asturian | ast | ast-ES | Yes | \LanguageTool-4.3\org\languagetool\resource\ast\hunspell\ast_ES.info | |||
Belarusian | be | be-BY | Yes | true | false | true | \LanguageTool-4.3\org\languagetool\resource\be\hunspell\be_BY.info |
Breton | br | br-FR | Yes | true | true | true | \LanguageTool-4.3\org\languagetool\resource\br\hunspell\br_FR.info |
Catalan | ca | ca-ES | No | false | false | false | |
Catalan (Valencian) | ca | ca-ES-valencia | No | false | false | false | |
Chinese | zh | zh-CN | Not tested | ||||
Danish | da | da-DK | No | \LanguageTool-4.3\org\languagetool\resource\da\danish.info | |||
Dutch | nl | nl | Yes | false | false | false | \LanguageTool-4.3\org\languagetool\resource\nl\spelling\nl_NL.info |
English (Australian) | en | en-AU | Yes | false | false | true | \LanguageTool-4.3\org\languagetool\resource\en\hunspell\en_AU.info |
English (Canadian) | en | en-CA | Yes | false | false | true | \LanguageTool-4.3\org\languagetool\resource\en\hunspell\en_CA.info |
English (New Zealand) | en | en-NZ | Yes | false | false | true | \LanguageTool-4.3\org\languagetool\resource\en\hunspell\en_NZ.info |
English (South African) | en | en-ZA | Yes | false | false | true | \LanguageTool-4.3\org\languagetool\resource\en\hunspell\en_ZA.info |
English (GB) | en | en-GB | Yes | false | false | true | \LanguageTool-4.3\org\languagetool\resource\en\hunspell\en_GB.info |
English (US) | en | en-US | Yes | false | false | true | \LanguageTool-4.3\org\languagetool\resource\en\hunspell\en_US.info |
Esperanto | eo | eo | Not tested | ||||
French | fr | fr | Yes | false | false | false | \LanguageTool-4.3\org\languagetool\resource\fr\hunspell\fr_FR.info |
Galician | gl | gl-ES | Not tested | ||||
German (Germany) | de-DE | de-DE | No | false | false | true | \LanguageTool-4.3\org\languagetool\resource\de\hunspell\de_DE.info |
German (Austria) | de-AT | de-AT | No | false | false | true | \LanguageTool-4.3\org\languagetool\resource\de\hunspell\de_AT.info |
German (Switzerland) | de-CH | de-CH | No | false | false | true | \LanguageTool-4.3\org\languagetool\resource\de\hunspell\de_CH.info |
Greek | el | el-GR | No | true | \LanguageTool-4.3\org\languagetool\resource\el\hunspell\el_GR.info | ||
Italian | it | it | Yes | true | false | true | \LanguageTool-4.3\org\languagetool\resource\it\hunspell\it_IT.info |
Japanese | ja | ja-JP | Not tested | ||||
Khmer | km | km-KH | Not tested | ||||
Persian (Iran) | fa | fa | Not tested | ||||
Polish | pl | pl-PL | Yes | false | false | true | \LanguageTool-4.3\org\languagetool\resource\pl\hunspell\pl_PL.info |
Portuguese (Portugal) | pt-PT | pt-PT | No | false | false | true | |
Portuguese (Angola preAO) | pt-AO | pt-AO | No | false | false | true | |
Portuguese (Brazil) | pt-BR | pt-BR | No | false | false | true | |
Portuguese (Moçambique preAO) | pt-MZ | pt-MZ | No | false | false | true | |
Romanian | ro | ro-RO | Yes | \LanguageTool-4.3\org\languagetool\resource\ro\hunspell\ro_RO.info | |||
Russian* | ru | ru-RU | Yes* Latin character words are ignored |
\LanguageTool-4.3\org\languagetool\resource\ru\hunspell\ru_RU.info | |||
Serbian (Serbia) | sr | sr-RS | Not tested | ||||
Serbian (Montenegro) | sr | sr-ME | Not tested | ||||
Serbian (Bosnia and Herzegovina) | sr | sr-BA | Not tested | ||||
Slovak | sk | sk-SK | Yes | true | false | true | \LanguageTool-4.3\org\languagetool\resource\sk\hunspell\sk_SK.info |
Slovenian | sl | sl-SI | Yes | true | false | true | \LanguageTool-4.3\org\languagetool\resource\sl\hunspell\sl_SI.info |
Spanish | es | es | Yes | false | false | true | \LanguageTool-4.3\org\languagetool\resource\es\hunspell\es_ES.info |
Swedish | sv | sv | No | false | false | false | |
Tagalog | tl | tl-PH | Not tested | ||||
Tamil | ta | ta-IN | Not tested | ||||
Ukrainian (Ukraine) | uk | uk-UA | No | true | true | true |
Complete post version is available be published in User Manual for new plug-in versions.