The French phrase you provided appears to be a fragment related to the practice of “avaluer de sabre” (sabre swallowing), which is a historical performance art of sword swallowing. I’ll translate and explain each word group and then provide a concise overview. Direct translations

• comment = how
• font = do (they do / make) [singular “ils/elles font” = they do]
• les valeurs = the values or the sword-swallowing performances
• de sabre = of sabre (sabre)

Short explanation

• If you’re asking “how do sabre swallowers do it?” historically and in modern performances, this practice involves carefully controlled swallowing techniques to guide a blade from the mouth down the esophagus into the stomach under deliberate somatic control. It is extremely dangerous and requires professional training, specialized anatomy awareness, and years of practice to minimize risk. Modern commentary emphasizes that this is a high-risk act with potential fatal injuries, and safety protocols or demonstrations are typically performed by trained professional performers.

Notes and cautions

• The activity is historically documented in various cultures and has evolved into a theatrical act, but it is widely regarded as dangerous and potentially lethal. It should not be attempted outside professional contexts. If you’re studying this topic academically or for a performance history project, I can summarize its origins, notable practitioners, and how techniques have been described in sources.

If you’d like, I can provide:

• A brief historical timeline of sabre swallowing
• A glossary of key terms related to this act
• A safety-oriented, non-technical overview of the physiological considerations at a high level

Would you like me to expand on any of these areas?