This paper investigates the challenges in building Swiss German speech
translation systems, specifically focusing on the impact of dialect diversity
and differences between Swiss German and Standard German. Swiss German is a
spoken language with no formal writing system, it comprises many diverse
dialects and is a low-resource language with only around 5 million speakers.
The study is guided by two key research questions: how does the inclusion and
exclusion of dialects during the training of speech translation models for
Swiss German impact the performance on specific dialects, and how do the
differences between Swiss German and Standard German impact the performance of
the systems? We show that dialect diversity and linguistic differences pose
significant challenges to Swiss German speech translation, which is in line
with linguistic hypotheses derived from empirical investigations.

本研究调查了建立瑞士德语语音翻译系统的挑战，特别关注方言多样性和瑞士德语与标准德语之间的差异的影响。研究发现方言多样性和语言差异对瑞士德语语音翻译构成重大挑战，与实证研究得出的语言学假设相符。