I found in "LibreOffice 3.5.3.2 (RC2) English UI/ German Locale [Build-ID: 235ab8a-3802056-4a8fed3-2d66ea8-e241b80] on German WIN7 Home Premium (64bit) under "Mail Merge Wizard -> Mail Merge Wizard - Starting Document -> Start from existing document - Browse": Actual text: "Locate the Writer document that you want too use, and then click Open." Correct text: "Locate the Writer document that you want to use, and then click Open."
Julien Nabet committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/help/commit/?id=10a89e6fec25262205e54741db45823abb630d0b Resolves: fdo#49244 [EN] WRITER: Typo in MAILMERGE LOCALHELP
Mark as fixed per comment 1.
Julien Nabet committed a patch related to this issue. It has been pushed to "feature/submodules": http://cgit.freedesktop.org/libreoffice/help/commit/?id=10a89e6fec25262205e54741db45823abb630d0b&g=feature/submodules Resolves: fdo#49244 [EN] WRITER: Typo in MAILMERGE LOCALHELP