fix: support language fallback for non found locales (#102)

Author: ovidiu1

packages/calendar/src/LionCalendar.js

@@ -67,7 +67,7 @@ export class LionCalendar extends LocalizeMixin(LitElement) {
             case 'uk':
               return import('../translations/uk.js');
             default:
-              throw new Error(`Unknown locale: ${locale}`);
+              return import(`../translations/${locale}.js`);
           }
         },
       },

packages/input-datepicker/src/LionCalendarOverlayFrame.js

@@ -106,7 +106,7 @@ export class LionCalendarOverlayFrame extends LocalizeMixin(DomHelpersMixin(LitE
             case 'uk':
               return import('@lion/overlays/translations/uk.js');
             default:
-              throw new Error(`Unknown locale: ${locale}`);
+              return import(`../translations/${locale}.js`);
           }
         },
       },

packages/input-datepicker/src/LionInputDatepicker.js

@@ -129,7 +129,7 @@ export class LionInputDatepicker extends LionInputDate {
             case 'uk':
               return import('../translations/uk.js');
             default:
-              throw new Error(`Unknown locale: ${locale}`);
+              return import(`../translations/${locale}.js`);
           }
         },
       },

packages/input-iban/src/LionInputIban.js

@@ -82,7 +82,7 @@ export class LionInputIban extends FieldCustomMixin(LocalizeMixin(LionInput)) {
             case 'uk':
               return import('../translations/uk.js');
             default:
-              throw new Error(`Unknown locale: ${locale}`);
+              return import(`../translations/${locale}.js`);
           }
         },
       },

packages/validate/src/ValidateMixin.js

@@ -97,7 +97,7 @@ export const ValidateMixin = dedupeMixin(
                 case 'uk':
                   return import('../translations/uk.js');
                 default:
-                  throw new Error(`Unknown locale: ${locale}`);
+                  return import(`../translations/${locale}.js`);
               }
             },
           },