How to manage plural in translation

• In English we have that

"dtMany":    { "message": "s" },
"dtSingle":  { "message": ""  },
"dtYears":   { "message": "$years$ year$plural$",     "placeholders": { "years":   { "content": "$1" }, "plural": { "content": "$2" } } },
"dtMonths":  { "message": "$months$ month$plural$",   "placeholders": { "months":  { "content": "$1" }, "plural": { "content": "$2" } } },
"dtDays":    { "message": "$days$ day$plural$",       "placeholders": { "days":    { "content": "$1" }, "plural": { "content": "$2" } } },
"dtHours":   { "message": "$hours$ hour$plural$",     "placeholders": { "hours":   { "content": "$1" }, "plural": { "content": "$2" } } },
"dtMinutes": { "message": "$minutes$ minute$plural$", "placeholders": { "minutes": { "content": "$1" }, "plural": { "content": "$2" } } },
"dtSeconds": { "message": "$seconds$ second$plural$", "placeholders": { "seconds": { "content": "$1" }, "plural": { "content": "$2" } } }

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Entry "dtMany" is for the plural mark.

Entry "dtSingle" is for the singular mark.

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• For example to translate year/years to French an/ans (nothing for singular, 's' for plural) process like that:

"dtMany":    { "message": "s" },
"dtSingle":  { "message": ""  },
"dtYears":   { "message": "$years$ an$plural$", "placeholders": { "years": { "content": "$1" }, "plural": { "content": "$2" } } }, 

you will get for example "1 an", "5 ans".

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• For example to translate year/years to Italian anno/anni (nothing for singular, 's' for plural) process like that:

"dtMany":    { "message": "i" },
"dtSingle":  { "message": "o"  },
"dtYears":   { "message": "$years$ ann$plural$", "placeholders": { "years": { "content": "$1" }, "plural": { "content": "$2" } } },

you will get for example "1 anno", "5 anni".

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• If one word works differently like month in Italian mese/mesi then process like that (don't use the generic plural management and use parentheses) :

"dtMany":    { "message": "i" },
"dtSingle":  { "message": "o"  },
"dtMonths":  { "message": "$months$ mese(i)",   "placeholders": { "months": { "content": "$1" }, "plural": { "content": "$2" } } },

you will get for example "1 mese(i)", "5 mese(i)".

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• If your language don't use suffix but prefix (or some thing in the middle) then process like that

-prefix:

"dtMany":    { "message": "pluralMark" },
"dtSingle":  { "message": "singularMark"  },
"dtYears":   { "message": "$years$ $plural$yearWord",  "placeholders": { "years": { "content": "$1" }, 

-in the middle:

"dtMany":    { "message": "pluralMark" },
"dtSingle":  { "message": "singularMark"  },
"dtYears":   { "message": "$years$ yearWordPart1$plural$yearWordPart2", "placeholders": { "years": { "content": "$1" }, 

-and so on...

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• I can see many times the word to translate, should I translate all occurrences ?

-> No I have to translate only the #### part (see the example below).

In the example below, the part #### will become the word for year in the target language, other stuffs have to keep untouched.

  "dtYears": {
    "message": "$years$ ####$plural$",
    "placeholders": {
      "years": {
        "content": "$1"
      },
      "plural": {
        "content": "$2"
      }
    }
  },