diff --git a/i18n/fy.json b/i18n/fy.json
index e61c7a02..f4fc33b9 100644
--- a/i18n/fy.json
+++ b/i18n/fy.json
@@ -39,37 +39,69 @@
 	"templatedata-doc-param-type-wiki-user-name": "Meidogger",
 	"templatedata-doc-params": "Berjochtparameters",
 	"templatedata-editbutton": "Berjochtdata beheare",
+	"templatedata-errormsg-jsonbadformat": "Ferkearde JSON-opmaak. Jo kinne dizze hanneling annulearje om it te ferbetterjen, de hjoeddeiske <templatedata>-oantsjuttings wiskje en it nochris besykje, of fierder gean om de âlde Berjochtdata te ferfangen troch nije.",
 	"templatedata-errormsg-insertblank": "Wolle jo wier Berjochtdata sûnder gegevens ynfoegje?",
 	"templatedata-exists-on-related-page": "Tink derom: Der stiet al in Berjochtdata-blok op de oanbelangjende side \"[[$1]]\".",
 	"templatedata-helplink": "Ynformaasje oer Berjochtdata",
+	"templatedata-invalid-duplicate-value": "De eigenskip \"$1\" (\"$3\") is in dûbele fan \"$2\".",
+	"templatedata-invalid-empty-array": "De eigenskip \"$1\" moat teminsten ien wearde yn syn groepsrige hawwe.",
+	"templatedata-invalid-format": "De eigenskip \"$1\" wurdt ferwachte \"inline\", \"block\" of in jildige opmaaktekenrige te wêzen.",
+	"templatedata-invalid-length": "Te folle data om te bewarjen ({{formatnum:$1}} {{PLURAL:$1|byte|bytes}}, {{PLURAL:$2|limyt is}} {{formatnum:$2}})",
+	"templatedata-invalid-missing": "Ferplichte eigenskip \"$1\" net fûn.",
+	"templatedata-invalid-param": "Unjildige parameter \"$1\" foar eigenskip \"$2\".",
+	"templatedata-invalid-parse": "Syntaksflater yn JSON.",
+	"templatedata-invalid-type": "De eigenskip \"$1\" wurdt ferwachte fan it type \"$2\" te wêzen.",
+	"templatedata-invalid-unknown": "Unferwachte eigenskip \"$1\".",
+	"templatedata-invalid-value": "Unjildige wearde foar de eigenskip \"$1\".",
 	"templatedata-modal-button-add-language": "Taal tafoegje",
 	"templatedata-modal-button-addparam": "Parameter tafoegje",
 	"templatedata-modal-button-apply": "Tapasse",
 	"templatedata-modal-button-back": "Werom",
 	"templatedata-modal-button-cancel": "Annulearje",
 	"templatedata-modal-button-changelang": "Taal feroarje",
-	"templatedata-modal-button-delparam": "Parametergegevens fuortsmite",
+	"templatedata-modal-button-delparam": "Parametergegevens wiskje",
 	"templatedata-modal-button-done": "Klear",
 	"templatedata-modal-button-importParams": "Parameters ymportearje",
 	"templatedata-modal-button-restoreparam": "Parameter werombringe",
 	"templatedata-modal-button-saveparam": "Bewarje",
 	"templatedata-modal-confirmcancel": "Wolle jo wier jo wizigings fuortsmite?",
+	"templatedata-modal-current-language": "Hjoeddeiske taal: $1",
+	"templatedata-modal-errormsg": "Flaters fûn. Soargje dat der gjin lege of dûbele parameternammen binne, en dat de parameternamme gjin \"$1\", \"$2\" of \"$3\" befettet.",
+	"templatedata-modal-errormsg-duplicate-name": "Flater fûn. De keazen namme wurdt al brûkt by in oare parameter.",
+	"templatedata-modal-errormsg-import-noparams": "Gjin nije parameters fûn by it ymportearjen.",
 	"templatedata-modal-format-block": "Blok",
 	"templatedata-modal-format-custom": "Oanpast",
+	"templatedata-modal-format-inline": "Op ien rigel",
+	"templatedata-modal-format-null": "Unbeskaat",
+	"templatedata-modal-format-placeholder": "Tekenrige berjochtparameteropmaak",
+	"templatedata-modal-json-error-replace": "Ferfange",
+	"templatedata-modal-notice-import-numparams": "$1 nije {{PLURAL:$1|parameter is|parameters binne}} ymportearre: $2",
 	"templatedata-modal-placeholder-paramkey": "Parameternamme",
 	"templatedata-modal-search-input-placeholder": "Sykje op taalnamme as -koade",
+	"templatedata-modal-table-param-actions": "Aksjes",
+	"templatedata-modal-table-param-aliases": "Aliassen (skaat mei komma's)",
 	"templatedata-modal-table-param-autovalue": "Automatyske wearde",
 	"templatedata-modal-table-param-default": "Standert ($1)",
 	"templatedata-modal-table-param-deprecated": "Utfazearre",
 	"templatedata-modal-table-param-deprecatedValue": "Utfazearrjochtline",
 	"templatedata-modal-table-param-description": "Beskriuwing ($1)",
 	"templatedata-modal-table-param-example": "Foarbyld ($1)",
+	"templatedata-modal-table-param-importoption": "$1 {{PLURAL:$1|parametersuggestje|parametersuggestjes}} tafoegje",
+	"templatedata-modal-table-param-importoption-subtitle": "Befettet: $1",
 	"templatedata-modal-table-param-label": "Lebel ($1)",
 	"templatedata-modal-table-param-name": "Namme",
+	"templatedata-modal-table-param-required": "Ferplicht",
+	"templatedata-modal-table-param-suggested": "Suggestje",
 	"templatedata-modal-table-param-type": "Type",
+	"templatedata-modal-table-param-uneditablefield": "Net bewurkber",
+	"templatedata-modal-title": "Bewurker foar berjochtdokumintaasje",
 	"templatedata-modal-title-addparam": "Nije parameter tafoegje",
 	"templatedata-modal-title-choose-language": "Taal kieze",
 	"templatedata-modal-title-language": "Taal",
+	"templatedata-modal-title-paramorder": "Parameterfolchoarder",
 	"templatedata-modal-title-templatedesc": "Berjochtbeskriuwing ($1)",
+	"templatedata-modal-title-templateformat": "Opmaaksuggestje wikitekst",
+	"templatedata-modal-title-templateformatstring": "Tekenrige oanpaste opmaak",
+	"templatedata-modal-title-templateparam-details": "Parameterynformaasje: $1",
 	"templatedata-modal-title-templateparams": "Berjochtparameters"
 }