Add Translations for the Language names and the Language Controller will...

import org.springframework.http.ResponseEntity;

import org.springframework.web.bind.annotation.*;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

	public ResponseEntity getLanguage(@PathVariable String lang) throws IOException {

		String fileName =  this.environment.getProperty("language.path") + lang + ".json";

		InputStream is = getClass().getClassLoader().getResource(fileName).openStream();

		InputStream is = new FileInputStream(fileName);

		HttpHeaders responseHeaders = new HttpHeaders();

		responseHeaders.setContentLength(is.available());

		responseHeaders.setContentType(MediaType.APPLICATION_OCTET_STREAM);

		responseHeaders.setContentType(MediaType.APPLICATION_JSON);

		responseHeaders.set("Content-Disposition", "attachment;filename=" + fileName);

		responseHeaders.set("Access-Control-Expose-Headers", "Content-Disposition");

		responseHeaders.get("Access-Control-Expose-Headers").add("Content-Type");

				</button>

				<mat-menu #languageMenu="matMenu">

					<button mat-menu-item *ngFor="let lang of languages" (click)="onLanguageSelected(lang)">

						{{ lang.label }}

						{{ lang.label | translate }}

					</button>

				</mat-menu>

			</div>

								<mat-select placeholder="{{'USER-PROFILE.SETTINGS.LANGUAGE' | translate}}"

									[formControl]="this.formGroup.get('language')" required>

									<mat-option *ngFor="let language of languages" [value]="language">

										{{ language.label }}

										{{ language.label | translate }}

									</mat-option>

								</mat-select>

							</mat-form-field>

			"XML": "XML",

			"JSON": "JSON",

			"DOC": "Document"

		},

		"LANGUAGES": {

			"ENGLISH": "English",

			"GREEK": "Greek",

			"SPANISH": "Spanish"

		}

	},

	"COOKIE": {

			"XML": "XML",

			"JSON": "JSON",

			"DOC": "Document"

		},

		"LANGUAGES": {

			"ENGLISH": "Inglés",

			"GREEK": "Griego",

			"SPANISH": "Espanol"

		}

	},

	"COOKIE": {