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This might work?

$ cat > tmp
g-82.text.text1.fr.worker1
g-xx.yyyyyy.zzzz.fr.worker2
g-xx.Africa.zzzz.fr.worker3


$ awk -F"[.]fr" '{print $1}' tmp
g-82.text.text1
g-xx.yyyyyy.zzzz...

How about

$ cat > tmp
g-82.text.text1.fr.worker1
g-xx.yyyyyy.zzzz.fr.worker2


$ awk -F".fr" '{print $1}' tmp
g-82.text.text1
g-xx.yyyyyy.zzzz