Add invitation for correction

_config.yml

@@ -78,6 +78,9 @@ defaults:
          lang: en
          link-str: English
          available: This post is also available in
+         correct: >
+           If you find a grammar mistake in my post,
+           please send me an email.
          base-url: "/"
     -
      scope:
@@ -86,6 +89,9 @@ defaults:
          lang: fr
          link-str: français
          available: Ce post est aussi disponible en
+         correct: >
+           Si vous trouvez un erreur de grammaire ou vocabulaire
+           dans mon post, envoyez-moi un email, s'il vous plait.
          base-url: "/fr/"
     -
      scope:
@@ -94,4 +100,7 @@ defaults:
          lang: de
          link-str: Deutsch
          available: Diese Artikel ist auch verfügbar auf
+         correct: >
+           Wenn Sie finden eine Fehlung in meinem Beitrag,
+           schicken Sie mir ein Email, bitte.
          base-url: "/de/"

_layouts/post.html

@@ -46,8 +46,10 @@ layout: default
       {% endif %}
       {% endfor %}
     </ul>
+    {{ page.correct }}
   </div>
 
+  <hr>
   <div class="post-content e-content" itemprop="articleBody">
     {{ content }}
   </div>

about.markdown

@@ -40,15 +40,27 @@ Some projects I proudly contributed to or authored:
 - [discord-meme-bot], a meme bot for discord
 - [wikt-cli], a CLI tool to search Wiktionary using its API
 
+# Translation
+
+I translate some of my posts to some languages other than English. If you're a native
+speaker or are proficient in the respective languages, feel free to help me improve
+my writing and correct my grammar or vocabulary mistake.
+
+Improvement for my English writing is also appreciated. I usually don't proofread
+my writing, thus it may contain some grammar, spelling error. The writing can also
+be bad due to repetitive vocabulary or lack of logical arrangement between sections.
+
+Please send me correction via email (see the contact below)
+and write in the corresponding language (e.g. write in French if you find a grammar
+mistake in French).
+
 # Contact
 
 Feel free to contact me via:
 
 - Mastodon: [@huy_ngo@fosstodon][fosstodon]
 - Matrix: [@xarvos:matrix.org][matrix]
-- Email: [Gmail][gmail] or [Disroot mail][disroot]
-
-If you are an employer, please know that I may not be always available since I'm currently a student, though I am looking for internship in the next few months. If you want to contact me, please only contact me via email and let me know who you are, what you are working with, and which position are you offering. I'm not comfortable with telephone call so please don't suggest that.
+- Email: [Gmail][gmail] or [Disroot mail][disroot] (see [email ettiquette][mail-etiq])
 
 # Copying
 
@@ -85,3 +97,4 @@ The source code for generating this website can be found on [GitHub][gh-blog], [
 [srht-blog]: https://git.sr.ht/~huyngo/blog
 [liberapay]: https://liberapay.com/huy.ngo/
 [patreon]: https://www.patreon.com/__huy_ngo__
+[mail-etiq]: /mail-ettiquette