This is an svg version of ព្រះរាជាណាចក្រកម្ពុជា, "Preăh Réachéanachâkr Kâmpŭchea", or Kingdom of Cambodia, written in Khmer.
<a href="//commons.wikimedia.org/wiki/User:Thylacine222" title="User:Thylacine222">Thylacine222</a>
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<span class="int-own-work" lang="en">Own work</span>