Grammar development makes up a large part of the multilingual rule-based application development cycle. One way to decrease the required grammar development efforts is to base the systems on multilingual grammar resources. This paper presents a detailed description of a parametrization mechanism used for building multilingual grammar rules. We show how these rules, which had originally been designed and developed for typologically different languages (English, Japanese and Finnish) are applied to a new language (Greek). The developed shared grammar system has been implemented for a domain specific speech-to-speech translation application. A majority of these rules (54%) are shared amongst the four languages, 75% of the rules are shared for at least two languages. The main benefit of the described approach is shorter development cycles for new system languages.