Add project files.

MyOffice.SPA/src/app/core/service/language.service.ts

@@ -0,0 +1,26 @@
+import { Injectable } from '@angular/core';
+import { TranslateService } from '@ngx-translate/core';
+
+@Injectable({
+	providedIn: 'root',
+})
+export class LanguageService {
+	languages: string[] = ['en', 'es', 'de'];
+
+	constructor(public translate: TranslateService) {
+		let browserLang: string;
+		translate.addLangs(this.languages);
+
+		if (localStorage.getItem('lang')) {
+			browserLang = localStorage.getItem('lang') as string;
+		} else {
+			browserLang = translate.getBrowserLang() as string;
+		}
+		translate.use(browserLang.match(/en|es|de/) ? browserLang : 'en');
+	}
+
+	setLanguage(lang: string) {
+		this.translate.use(lang);
+		localStorage.setItem('lang', lang);
+	}
+}