u^\mu  \{ {{\cal Q}}_R^{\rm em}, {{\cal Q}}_L^{\rm w} \} \rangle 
\right. \right. {\nonumber \\}&&  \left. \left.
+ X_2 {\overline}{\ell} \gamma_\mu \nu_{\ell L} 
\langle u^\mu  [{{\cal Q}}_R^{\rm em}, {{\cal Q}}_L^{\rm w}] \rangle
+ X_3 m_\ell {\overline}{\ell} \nu_{\ell L} \langle {{\cal Q}}_L^{\rm w} {{\cal Q}}_R^{\rm em} \rangle
\right. \right. {\nonumber \\}&&  \left. \left.
+ i X_4 {\overline}{\ell} \gamma_\mu \nu_{\ell L} 
\langle {{\cal Q}}_L^{\rm w} {\widehat}\nabla^\mu  {{\cal Q}}_L^{\rm em} \rangle
+ i X_5 {\overline}{\ell} \gamma_\mu \nu_{\ell L} 
\langle {{\cal Q}}_L^{\rm w} {\widehat}\nabla^\mu  {{\cal Q}}_R^{\rm em} \rangle 
+ h.c. \right]  \right. {\nonumber \\}&&  \left.
+ X_6 \bar \ell (i \! \not\!\partial + e \! \not\!\!A )\ell
+ X_7 m_\ell {\overline}\ell  \ell \right \}. \end{aligned}$$ Estimates of the electromagnetic LECs $K_i$ and $X_i$ will be reviewed in Sec. \[sec:photons\].

In this review we restrict ourselves to mesonic Lagrangians for strong and semileptonic processes including radiative corrections. [ChPT]{} has been applied to many more cases even in the meson sector, which will not be treated in any detail here. Neglecting lattice actions altogether, two more classes of chiral Lagrangians have been considered for the treatment of odd-intrinsic-parity (anomalous) processes and of nonleptonic decays. We include some relevant references here for the Lagrangians and for estimates of 