Code of Conduct?
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Translation sites like TWN can become battlefields for edit wars between people holding different sets of terminology from different sources. Random people coming just to "fix this s****ed up string" and old translators can easily start to fight with each other. These fights are often pointless and counterproductive by nature, leading to potentially decreased overall translation quality.
A written version code of conduct based on general wiki principles such as openness, friendless, and sharing should help reduce such possibility. In jargons familiar to Wikipedians, this roughly corresponds to w:WP:IAR, w:WP:CIV (w:WP:BITE), and w:WP:OWN.