求翻译：18——19世纪中期，字体识别性呈下降趋势。工艺美术运动和新艺术运动都是当时非常有影响力的艺术运动。它们在设计风格上都十分强调装饰性，而这一时期字体设计的主要形式特点也体现在这个方面。是什么意思？

18 - mid-19th century, the font identification of a downward trend. Arts and Crafts Movement and Art Nouveau were very influential art movement. They have put great emphasis on the design style decorative font design the main form of the characteristics of this period is also reflected in this regar

18 - Mid 19th century, the font, are on the decline. Arts and Crafts Movement and art nouveau movement at that time were very influential art movements. They%