# Localizing functions

You can localize a function's ID and error messages. Currently, the library supports 16 languages with English as the default.

To change the default language all you need to do is to import and register the language like so:

// import the French language pack
import frFR from 'hyperformula/es/i18n/languages/frFR';

// register the language
HyperFormula.registerLanguage('frFR', frFR);


To import the language packs, use the module-system-specific dedicated bundles at:

  • ES: hyperformula/es/i18n/languages/
  • CommonJS: hyperformula/commonjs/i18n/languages/
  • UMD: hyperformula/dist/languages/

For the UMD build, the languages are accessible through HyperFormula.languages, e.g. HyperFormula.languages.frFR.

Then set it inside it the configuration options:

// configure the instance
const options = {
    language: 'frFR'

Language pack names should be passed as a string. They follow a naming convention that incorporates two standards: ISO-639 and ISO-3166-1. The pattern is languageCOUNTRY, for example nbNO, frFR, enGB etc.

You can freely use the localized names: SUM can be written as SOMME and the functionality of the function will remain the same.

Here are some example functions and their translations in French:

// localized functions
 functions: {

Same goes for the errors displayed inside cells when something goes wrong:

// localized errors
  errors: {
    CYCLE: '#CYCLE!',
    DIV_BY_ZERO: '#DIV/0!',
    ERROR: '#ERROR!',
    NA: '#N/A',
    NAME: '#NOM?',
    NUM: '#NOMBRE!',
    REF: '#REF!',
    VALUE: '#VALEUR!',

# Localizing custom functions

You can translate your own custom functions into different languages too. You need to define the translations and register the corresponding language pack after registering a plugin:

const translations = {
    'enGB': {
      'HYPER': 'HYPER'
    'plPL': {
      'HYPER': 'HAJPER'

# List of supported languages

Language name Language code
English enGB
Czech csCZ
Danish daDK
Dutch nlNL
Finnish fiFI
French frFR
German deDE
Hungarian huHU
Italian itIT
Norwegian nbNO
Polish plPL
Portuguese ptPT
Russian ruRU
Spanish esES
Swedish svSE
Turkish trTR

# Demo