title: How to remove all of the diacritics from a file?
body: <p>I have a file containing many vowels with diacritics. I need to make these replacements:</p>
  
  <ul>
  <li>Replace ā, á, ǎ, and  à with a.</li>
  <li>Replace ē, é, ě, and  è with e.</li>
  <li>Replace ī, í, ǐ, and  ì with i.</li>
  <li>Replace ō, ó, ǒ, and  ò with o.</li>
  <li>Replace ū, ú, ǔ, and  ù with u.</li>
  <li>Replace ǖ, ǘ, ǚ, and  ǜ with ü.</li>
  <li>Replace Ā, Á, Ǎ, and  À with A.</li>
  <li>Replace Ē, É, Ě, and  È with E.</li>
  <li>Replace Ī, Í, Ǐ, and  Ì with I.</li>
  <li>Replace Ō, Ó, Ǒ, and  Ò with O.</li>
  <li>Replace Ū, Ú, Ǔ, and  Ù with U.</li>
  <li>Replace Ǖ, Ǘ, Ǚ, and  Ǜ with Ü.</li>
  </ul>
  
  <p>I know I can replace them one at a time with this:</p>
  
  <pre><code>sed -i 's/ā/a/g' ./file.txt
  </code></pre>
  
  <p>Is there a more efficient way to replace all of these?</p>