1 files changed, 9 insertions, 2 deletions
diff --git a/server/lib/client-html.ts b/server/lib/client-html.ts
index e59505614..1d8a08ed0 100644
--- a/server/lib/client-html.ts
+++ b/server/lib/client-html.ts
@@ -26,7 +26,9 @@ export class ClientHtml {
  }
  static async getDefaultHTMLPage (req: express.Request, res: express.Response, paramLang?: string) {
-    const html = await ClientHtml.getIndexHTML(req, res, paramLang)
+    const html = paramLang
+      ? await ClientHtml.getIndexHTML(req, res, paramLang)
+      : await ClientHtml.getIndexHTML(req, res)
    let customHtml = ClientHtml.addTitleTag(html)
    customHtml = ClientHtml.addDescriptionTag(customHtml)
@@ -98,6 +100,7 @@ export class ClientHtml {
    let html = buffer.toString()
+    if (paramLang) html = ClientHtml.addHtmlLang(html, paramLang)
    html = ClientHtml.addCustomCSS(html)
    html = await ClientHtml.addAsyncPluginCSS(html)
@@ -106,7 +109,7 @@ export class ClientHtml {
    return html
  }
-  private static getIndexPath (req: express.Request, res: express.Response, paramLang?: string) {
+  private static getIndexPath (req: express.Request, res: express.Response, paramLang: string) {
    let lang: string
    // Check param lang validity
@@ -129,6 +132,10 @@ export class ClientHtml {
    return join(__dirname, '../../../client/dist/' + buildFileLocale(lang) + '/index.html')
  }
+  private static addHtmlLang (htmlStringPage: string, paramLang: string) {
+    return htmlStringPage.replace('<html>', `<html lang="${paramLang}">`)
+  }
  private static addTitleTag (htmlStringPage: string, title?: string) {
    let text = title || CONFIG.INSTANCE.NAME
    if (title) text += ` - ${CONFIG.INSTANCE.NAME}`