Localisation practice at Nintendo, Sony Interactive Entertainment and Ubisoft, and in engine ecosystems such as Unity, stresses two things: a profile for every character (verbal tics, forms of address, tone), and strict isolation of strings from code tags. Without the first, characters blur into one voice; without the second, launch day brings broken markup.
Text expansion is also underestimated. English into Chinese usually shrinks, while Chinese into English or German can grow noticeably, and buttons, item names and quest boxes feel it first. We set a character budget per control at quoting stage and supply short variants as we translate.
Note: Etrans regularly handles document translation projects involving the international brands named above and is familiar with their terminology and layout conventions. Brand names describe document types and project context; they do not imply endorsement or authorisation by the brand owner.